Can You Run a Building Site with NO Power?
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- Опубликовано: 30 июл 2024
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I am retired now, but worked in trades all my life. I have never ever seen an electrician open a panel where they did not exclaim "Who in the F**K wired up this mess". I have even seen this happen where the electrician doing the exclaiming, was the same one who years earlier did the original wiring. Cheers.
haha so true. I am so guilty of that when pulling any wall/kitchen/joinery/deck/whatever apart. "What the f*ck did they do?!"
Isnt that part of the job? Especially for sparkys
Electrician is not exactly a high skilled job, but they sure like to pretend that it is.
But it wasn't him that did it. It was a younger less experienced him. We should learn to get better at what we do every day.
This reminds me of programmers reviewing code that they wrote just 6 months prior. :)
SB: Can You Run a Building Site with NO Power?
Every builder before 1880: Are we a joke to you?
We were building houses in the US with no power right up into the 1950's.
My master, Fred, didn't own a power tool until he had to be cutting 3/4" (19mm) ply.
Handsaw and hatchet, brace and bit, a 20oz Vaughn claw hammer with an octagonal grip.
Hahahahahaha good one 👍👍😂😂😂😂😂😂😂😂😂😂😂
It’s the Young ones don’t get the struggles we had back in the day 😂
@@paulhardie392 I remember when I was _HUGE_ to have a temporary power pole, and a phone in a waterproof enclosure, so you could call for concrete or something.
Now I can text a photo of damaged delivery, or even live chat with my salesman about the screwup.
Times _HAVE_ changed, my friend.
And my friend everyone of those builders before 1880 is underground in a wooden box not made by themselves (I meant made by someone else)
BTW, Scott, thanks for another great video. My favorite channel- no screaming , no stomping feet. Even keel. Very professional. Enjoyable and very easy to watch quality work by true professionals.
Festool power bank coming soon in 🇬🇧. Just need a bank to pay for it
I’ll be getting that then
Better start saving 😂
Best part of £3k, I suppose it's cheap if you wanted to replace a few festool corded tools with battery ones, a battery kapex would no doubt be eyewateringly expensive.
On the other hand for almost £3k you'd hope it has a much better lifespan than most normal batteries
@@robertkirkham1772 as an electrician that fits £10k+ UPS for POS, I can guarantee the batteries are as shit as any other battery.
@@darylsavage119 probably the same cells from China as most batteries I imagine.
the bank must be very powerful
The batteries aren't rated in Amps (A), they're rated in Amp-Hours (Ah), it's a measure of electrical charge capacity in the battery eg a full 4Ah battery has the capacity to deliver a current of 1A for 4 hours or 2A for 2 hours etc.
Electrical power (Watts) is found by multiplying current x voltage eg 1A at 40V is 40W.
Electrical energy (Watt Hours) is found by multiplying power x time eg 40W for 4 hours is 160Wh.
So, if you want to know how much energy is in your battery, multiply the capacity (Ah) by voltage (V) eg a 4Ah battery at 40V is 160Wh
I did not know that!
Was watching on my TV and got my laptop out to explain this, but your explanation is spot on and really well laid out. Nice one!
Ohms law and watts law baby 🙏 nice explanation
genuinely needed this
I hate how batteries are still rated in amp hours. It's a crappy unit of measurement that is redundant and unfit for purpose. They should all be rated in watt hours because watt hours don't depend on voltage. With 12v, (actually 11.1v, same with the BS about 20v, 40v and 60v) 18v, 36v and 54v all being common now, amp hours become complicated to figure out for most people who don't understand electricity. To the point where they actually think the Dewalt Flexvolt has less runtime at 54v because a 6AH goes to 2AH. 2A at 54v is 3 times the wattage of 2A at 18v so...
With watt hours the math is already done because watts are a unit of work, the bit people actually care about. Amps mean nothing without knowing voltage, unless you are worried about wire gauge or something.
I’m an electrician so usually when I’m on site there is no power. Most cordless stuff is worth the expense these days. Thanks for another great episode Scott!
Install an inverter in the back and charge your batteries while driving. No need for cords again. Best thing I did.
I love how all you makita stuff is in nice sustainers and that Milwaukee shit just thrown in van 😂👍
Where it belongs 😂
@@abdcontractingltd my uncle uses them it’s like there built from the same plastic as kids toys 🤮😂
Probably because the milwaukee batteries he has are fake
@@cristianmunoz2480 are you sure? I think the decals are different in different countries
@@chrisE815 I mean maybe so but I've been buying the M18 batteries and found some replicas that look like that. Look up m18 replica batteries on RUclips and they look like those
I have one comment. Thank you for saying you got tools for free. The Instagram world in Aust is full of people not saying this or simply lying and saying they paid for them or being ambassadors and denying it until they are called out. So thank you for being honest.
Scott brown killing it on RUclips 🙌🏻 the man uploads, I stop what I’m doing, like and watch
In U.k when building new houses we have to have our own generator so going full cordless was a no brainer , used to spend £1500 -£1900 on petrol a year plus the aggro of carrying gene and leads, I use makita, some twin tools , got 14 batts 5ah, sometimes use them all , mostly in coffee maker 👌
Me to, lol. cordless is deffo the future..
Virtually same here, dragging a Genny around was a pain for years, good riddance
A portable gas stove would be more efficient than using precious battery resources to make tea & coffee... 🤔
Who the heck are these three ppl who downvoted?! Who downvotes SBC?! As far as I'm concerned, we all need a little more 'smoko time' in our lives.
"Big Corded" goons.
And saying that. There was no smoko time this epsode. 😯 Allways 👍👍 from me.
Love it when a new video arrives.
Scott. Fascinating. What an insight. The future. The renovation project looks intriguing, should be an excellent series here. Thanks again. Stay safe and healthy. Cheers.
I can remember when it was hand tools only on our job site almost 50 years ago now look I'm just about all battery now and yes I'm still on the tools and just about to turn 66
More power to you and post some work vids and spread any knowledge or wisdom you’ve gathered through the years. May be interesting.
Good on ya Bob. Been doin it for 40yrs(ish) myself....
Wheel brace, brace and bit, pump action screwdriver, plough plane in fact about 6 different planes , 5 different saws(that you had to sharpen yourself) when I bought my first electric drill the guy teaching me thought I was mad when I started drilling out locks, soon changed his mind when I doubled the amount I could do haha
Great setup but I’m too tight to go all cordless! Great for site work, I’ve never ever not been able to get a supply on domestics unless literally no service. Could always jump a lamppost 🤣
Best videos on the internet! Always enjoy your exciting projects and reviews!
Love the videos. All types of content. I’m new to the carpentry industry so it’s a huge learning curve for me. Keep up the good work 🤙🏽
I really appreciate how you keep all jobsites clean! You guys go to far more lengths than many others to remove any demolition materials as they come out! Improves quality of work, removes more surprises as you have a better view on underlying constructions and surely also joy and appreciation of the job at hand!
Scott, you were wondering about the battery life. If you look at the side, it will say 2.5 Ah, or 4.0 Ah.This is because batteries are rated by Amp-hours. The tools have a given Voltage, 18 V or 40 V. So when they work harder, they draw more current. Current is measure in Amps. An Amp-hour is a way of measuring how much energy a battery stores. It's current x time. A 2.5 Amp-hour batter can draw 2.5 Amps for 1 hour. Or it could draw 0.5 Amps for 5 hours. Or 5 Amps for 0.5 hours. In all these cases, Amps used x time = 2.5. So a 4.0 Ah batter stores more energy than a 2.5 Ah. Again, you could draw 4 Amps for 1 hour, or 0.5 Amps for 8 hours, etc.
Hope that helps!
"Maybe e should be using the pointy one..." I love the technical banter on this channel👍
The answer is yes, as long as you’ve got the money.
Or Makita and Milwaukee gift you a heap of tools
He can use the days wage he made from being able to work with no AC
Both lol
Yes it’s an advertisement. A lot of tools were gifted but he’s not lying, I’ve been lucky enough to use some high end cordless tools and they definitely compete with the corded gear nowadays.
Your making a different point. Hand tools could probably do all of this and I’m a lover of hand tools myself but in the modern industry you’d be stupid not to use power tools.
"I can make it up to you, but I can't make it up to the world"
That was pure class
translated: you are a dumbass.
A 2.5 amp hour battery will run a tool at 1 amp for 2.5 hours. If the tool draws less than 1 amp it will last longer, if it draws more than 1 amp it will last shorted
I admire his honesty.
Only at electrician school will you learn that saying lol
The 4 ah(amp hours) is a messure of the capacity, so you can use 1amp for 4hours or 2amp for 2h etc and amp * voltage equal wattage
I watch some guys explaining tools on another channel. They are allways going on about battery's being built up of rows of cells and the rows being connected in parallels.
And going from 2,5 to 4 would bring in a second row, which would increase the amount of amps you can draw at the same time.
And since power = voltage x current beign able to draw a higher current (amps) you can deploy more power in a moment.
That's why to me that hammer drill on 2,5 seemed a bit of a bad idea, luckily nothing stuck real bad (increasing the power demand).
@@bertbergers9171 the benefit of the extra row of cells is that the tool can draw power from more different cells simultaniously. This is why (most) tools will benefit from a higher amp battery.
Yes it's the capacity of the battery, but saying 1amp = 4 hours and 2amp = 2hours is total bullshit and stop misleading people. The higher the amps the more capacity it has. It also depends on the power draw of the tool on the battery.
@@milangeurkink9917 Tools can only draw a maximum amount of amps it's designed to use. Fuck sake, it doesn't take a genius to look up websites from people in said fields about this kind of information.
@@bertbergers9171 That hammer drill is a 18v tool. It's fine on that battery(40v) ffs, it uses 18v and amps don't matter as long as it's not drawing more than 2.5amp (which it's not)
Makitas lack of cordless table saw is a real problem. I have been making door frames and that saw is the only tool I actually need power for. If it wasn't for that I could have the power disconnected and save $100 for the quarter. It also traps sawdust badly with or without dust extraction.
All Makita needs to come up with now is a solar charger so you can work completely off grid 😀.!
Or some heavily roided rats to spin the generator.
Have been running cordless now for 4 months. I set up two 12 volt batteries with twin solar panels. I have makita and milwaukee 12 volt battery chargers in the trailer. I run a 5000 watt peak inverter. I run a small 240 volt compressor, run the concrete mixer, run the jack hammer and have run grinders and a small welder remote.
Works a treat
I have been cordless on the job site for about 2 years now. I love it!
I’ve got virtually the exact same setup. From the dewalt mitre saw stand to the cordless Milwaukee table saw.
Using the Makita Bluetooth vacuum with the track saw is honestly a pleasure to use. I prefer it over the Festool combo.
I don’t miss running extension cords at all. Especially rainy days or when you need to run power from inside and the door won’t shut completely because of the cord.
Never again!
Thanks Scott 👍
I really like the way you do demo, only breaking up what needs to break and not just breaking everything in to small pieces. Also cleaning up in between, it keeps your site very neat and clean! I've been to many job site where they just break everything. Love the Channel! Greetings from the Netherlands!
I'm the same way. My customers are always shocked how tidy everything manages to stay during demo and I don't just walk in with a sledge hammer. I'll demo for 30 minutes, clean up for 30 minutes etc. Things stay tidy and the space doesn't take on any unnecessary damage.
I have a couple of Makita cordless circ saws and they are way, way better than my old corded Porter Cable. I'd never go back.
Ah, Thanks for posting Scott! I've been a fan for more then a year now. You've inspired me to start creating videos too. I'll be documenting building my fathers off grid cottage in May, and we won't have power for probably the first month.
Its been a toss up of using a generator or investing in more battery operated tools.
This video was helpful!
Solar mate with genny back up of cloudy days and wind for peak loads. Are you gonna post timelaps or vids?
@@ryanslut5607 Yea man! Just started the channel up, getting some practice videos in, aiming for a few videos a day. We're getting the slab on grade done next week, so I'll be up there soon to tackle it. Feel free to follow along 'zackcrafted' !
Thanks for the video. Interesting mish mash floor - tile over vinyl over timber. I don’t know if it’s available (or anything comparable), but the dewalt power station is interesting - plug in corded tools. Then there are the adaptors that let you use one tool manufacturer’s batteries on others’ tools. Finally able to buy best tool for the job. I also finally bought some plastic covers for my batteries while I carry them in a bag. Necessary? Who knows. Thanks again.
This is how batteries sizes work.
The power from a tool is not determined by the battery - except that high power tools often cannot use a small battery because it can't provide enough power.
The energy in the battery (the amount of work it can do, how long it will last) is determined by the voltage x Ah.
That means that a 4Ah battery will last twice as long as a 2Ah battery.
Also a 40V 2Ah battery will last twice as long as a 18V 2Ah battery.
A 40V 4Ah battery is 4 times bigger than a 18V 2Ah battery.
Also a 40V battery can be operated more efficiently than an 18V battery.
im a concrete guy and these cordless tools are a game changer ... we are in and out of a job site before a power source is on site
Great videos as usual Scott!!!!!!!
interesting topic, also think this is the future of tools. Love your choice of background music.
Scott... our of ALL the cordless tools you have. Those dam Milwaukee crates are the best money spent.
i have 3 love them.
The stored energy in a 40V battery pack is higher.
40V * 4.0Ah = 160 Wh
40V * 2.5Ah = 100 Wh
18V * 4.0Ah = 72 Wh
More energy -> longer runtime
Milwaukee 12.0Ah
18V * 12.0Ah = 216 Wh
@@fx_gtx9495 All li-ion batteries have a nominal voltage of 3.7. So, you can call the Milwaukee a 20, or you can call the Makita a 36 volt. It's all in the marketing. They are all 21/700 cells, no matter what the voltage of the tool.
That’s wicked SB. Love being able to go cordless on site. The only thing we don’t have cordless atm is a vacuum so it’s annoying when you’re running one lead just for that.
Pretty impressive 40v battery life too
Great video Scott,very interesting.👍👍👍
Thanks Scott, It's been a white that I've been doing it cordless but I don't own a cordless drop saw or vacuum, instead I run a 12V system in my van and I'm running a 2400W pure sine inverter to charge up my batteries or possibly run a corded tool for a short time. I have used my heat gun and Festool midi vacuum and it's been great.
The electrician was hilarious. But for reference the 40v batteries are actually a nominal 36v.. So a 4 amp battery at 36v would be 144watts. For comparison a 18v battery at 4 amps would only hold 72watts.
Scott think of it like this... The voltage is the engine and the Ah is the fuel tank. So a 4ah 40v will run twice as long as a 2ah 40v but they will both have the same power.
So whats a 12v 100ah battery? I kinda get the fuel tank/engine thing. Good explanation.👍
Unless the cell arrangement allows for higher amp draw.
But voltage droop in lower Ah batteries plays a part in power-hungry tools....
I’m at 95% cordless, still a few relics I take on site with me. Vacuum, track saw, main mitre saw otherwise I’ve made the switch and man is it ever more convenient. Just picked up a small cordless mitre saw and moving it around a house installing flooring was fantastic
I’ve been slowly but surely swapping over to makita cordless tools, and love them so far!
Regardless of what other viewers will say, I find run time to be the major limit. I was drilling 7/8 (22mm) step bit holes into steel with a milwaukee 2704 and managed to drill 2 holes with 2 3.0AH high output batteries before they died from full charge. Battery life was much better with my German made Metabo SB 18 LT BL with 2.0 AH batteries. I managed to complete the project with the 2 batteries from that kit drilling about a dozen 7/8" (22mm). Maybe milwaukees battery technology just isn't there yet (but I also don't buy many of their tools because the quality isn't there). In a similar fashion, it took a fully charged 4.0ah De Walt battery to cut thru a piece of 100 mm steel pipe for a plumbing drain. If you only have 2-3 batteries for the day, you'd be out of luck after cutting that pipe. I think every tradesman should have a electric copy of the cordless tool in their truck or shop just in case.
I have the Makita 36V recip saw. One of my favorite tools. Being able to use the 18V batteries is a huge bonus those of us that don't need many 40V tools.
Get the 40v repo saw n u get a converter for charging 18v on the same charger. Pretty neat.
depends heavily on the tool for me. from my experience, cordless vacs really chew through the batteries so I keep them corded, so tools that I will pretty much exclusively use with a vac attached will be bought corded too. like my tracksaw, miter saw, sander :)
Site, not shop.
Ngl it hurt when I saw you taking out that tile. It has really come back in style. At least here in the us.
We've been completely cordless for about a year now. HiKoki nail guns and makita 18v for everything else!
Love the cordless crowbar.
Cordless hammer level and broom
Awesome video as usual Scott
Scott you should do a video on the differences between residential builder vs commercial. I'm a commercial first year and I see a lot of apprentices come and go because they don't understand the difference
My boss does both so i have to aswell haha
I’m a Formwork carpenter, a lot of the time cordless gets the job done but there’s still times when you have to get out the old corded Makita 9 1/4 when there’s serious cutting to be done.
Here near Montréal Canada, builders use generator all the time . Builders don't use clients electric power . By the way ,
I follow you since your first episode . I have very good souvenirs from New Zealand .1986 .Life is very short .
I’m carpenter from London, around 6 months completely cordless with Dewalt, 8 Flexvolt batteries and 7 XRs. really good feeling when you can set up anywhere without messing up wires, extension leads and 240-110 transformers (in UK construction sites are on 110v, but private clients 240v of course, so it’s always mess! 😃😎
It's funny to see all three major brands all in one shot.
I use a lot of Dewalt cordless tools in the field, and I bought one of their small 12V to 110V inverters that plug into your cigarette lighter. I charge batteries all day while I am working. I do still have all of my heavy duty site tools on cords, but that is mainly due to my aversion to battery formats becoming obsolete. The corded ones will last longer than me without having to buy new ones, but that may be relative because I'm am pretty friggin old!!
I like Nate. He looks like an intelligent and sensible lad 😉
Any sparky named Nate is cool by me!!
Nate you cheeky bastard! You watch Scott Brown too?! Kia Ora from the BuildRight boys 😂
My major concerns with going full cordless are the battery’s not the tools. I charge my drill and impact drivers one or twice a week with daily use, I’d imagine I’d have to charge the saw battery’s and vacuum everyday. That’s a lot of battery’s to remember everyday plus the space to charge them. Also we all know the more you use a battery the fast they die so I’m wondering how long these will take daily abuse. Also I think it’s the dwalt where it’s battery but you can also connect it to the wall I think that’s the way I’ll go best of both worlds. Love the vids Scott
We do in the uk everyday!!! I haven’t had a generator in my van for 3 years now!! Battery m class the lot!
Cordless tools is deffinintly the way forward we getting better battery/tool efficiencies all time so will see improvements in years to come scotty .. keep up the good work
Yep..had to do a coldroom build at a meatworks. It was on a xmas shutdown and it was pitch black in there. We had to fit all the stainless the week after xmas when it was operational and inside it was -40° and outside was +35° Battery power is life !
I also found out aeg charger's do not work in under 10°...Milwaukee was king on that job.
Love the electrician.
Chisel bits, I'd highly recommend the mikwaukee self sharpening chisel for the sds. It's hands down the best chisel bit I've ever bought, I need to watch it like a hawk though the other trades like to "borrow" it
At work we did seismic upgrades in an old school in the attic. I had to rotodrill honestly about 300 holes and we needed to use sds bits that had vacuum attachments or silca filled dust would just be insane, I tell you that to tell you this that mikita portable hepa vac is the best tool made its small and powerful and works amazing!
Definitely yes, I'm getting a new house built and they have all but finished with no power connected. The only trade that needed a generator was the plumbers, mainly because they didn't have the cordless tools available.
I was a cable guy in the mid 90s. We used to carry around the light socket plug adapters. My first cordless tool was the 9.6v Makita drill with the long handle. Even then it was a game-changer. It wasn’t long until 14.4v came and cordless drills and impacts were practical for commercial work. Now I only have corded tools for big stuff, table saw, drop saw, or too spendy to justify like my Hilti SDS max rotohammer.
I have a 22v hilti drill. Really good tool. Expensive batteries tho.
The Amp hours is based on the design of the battery cells inside the packs, some battery cells are connected in parallel thus allowing more output or more runtime under reduced load. Generally there is a circuitry inside (logic) that changes the output depending on the load. More powerful tool = higher power output, less powerful tool = longer runtime with the same battery.
Each manufacturer has their own marketing around their tools, but that is the theory anyway. I know my old 18V dewalt driver is more powerful than my newer 20v slimline model. But obviously the older tool is more heavy to use. Different tools for different jobs. Now i could purchased a higher amp/hours 20v battery for my new drill but I use it for drywall and like the lighter tool when working, so I just have 2 batteries going one on charge and one in the tool.
Best investment I made was a battery vacuum and multi tool, both Bosch. Vac uses their 8Ah battery, lasts a couple of days easy.
FYI; after using the Bosch multi tool just be wary of using the same battery in their other tools as they can get jammed. Bosch rep showed me a design flaw where the constant vibration from the multi tool causes a little lip of plastic to raise on the plastic sprung catch and jamb the battery in a tool. Has happened which required the partial disassembly of a battery, easy fix.
I've just bought a Bosch 18v bi turbo sds max, 7.1 joules of impact energy, its a real beast, and cost £739 uk pounds , come with 2x 8ah Pro cor batteries.
If you want a something that would massively improve a cordless job site putting a small inverter and solar panel in your van hooked up to the battery is super useful all it needs to do is power 3 or 4 chargers but it means you can have fewer batteries while working for as long as you choose to
Hey Scott Brown Here, I have the same Milwaukee packout system i love it!
A video that needed doing. Awesome!
Love your video's!! Just a note.... if you have to charge a battery, you could buy an inverter... just a thought..
Again awesome video's and work
I’ve been cordless for 3 years started with Makita because I had a 6 piece kit so just brought more skins.So my van for the boys is Makita then I fitted out my Ute with dewalt and loving it. Leads are old school and it’s painful watching apprentices pack them back in the van
8:27 that sparkie Nate is a fool man😂😂😂
There are three killers for cordless tools.
1) The time you save running out cables you spend double messing about with charging at home.
2) The tools cost significantly more and are generally less powerful.
3) The tools are more complex so don’t last as long as the mains stuff.
A third factor is you’ve gone from using the clients power to do jobs to using your own. It may seem silly but if you use £2.5 in electric charging all your batteries each night. That’s £600/year straight out of your profits.
I’m completely cordless and at a point now where I don’t even need to bring a charger on site. I can cut for 3-4 days steady on my 12” Milwaukee mitre saw, the 12ah batteries are absolute beasts
It really depends on the specifics of your job.
Domestic electrical work, corded tools are wonderful from start to finish from your little hammer drill to the big one to the multi tool to the vac.
Commercial servicing which is what I do now, I've taken all my corded tools out because having to set up leads for jobs takes too much time. Time is so much more important here than it is in domestic so the cost of a cordless vac was worth every cent
13:02 I'm always moving distribution and consumer boards.
To save me wasting time setting up temp supplies for fridge/freezers or get them back online as a priority. I went all cordless a long time ago and invested in a petrol generator. Working in the industry helps to have both electric and cordless. If it saves hassle and makes you more efficient, it's worth the investment. 😁
I work fully cordless, I work a lot in farm and shed building without any powersource near. My van is equipped with some solar panels and even in de winter (less solar charge) I can charge all my batteries if needed without any problems. For me this has been the easiest and cheapest option because generators are more expensive in fuell and sometimes maintainance then buying the tools etc. I mainly have DeWalt flexvolt and Hikoki/Hitachi/Metabo HPT multivolt equipment.
Also I believe your Dewalt table saw is of larger blade diameter compared to the milwaukee right? this is probably also a weaker saw when corded I think.
love the video, great subject!
I’m an electrician, have a couple of corded tools, not many. Have an inverter and battery and charge the tool batteries while on site or driving. Always have 5 full batteries at the ready
I just bought a Milwaukee cordless pipe threader. It came with two 12Ah batteries (18v), $1800 USD. Not going to get rid of my corded Ridgid 700 (yet.)
As a licensed electrical contractor I very rarely use a cord because I have inverter mounted on my truck and plenty of batteries and multi chargers never run out of power so all good
We had an early Makita drill (the one with the long battery in the handle) in the boatyard in the mid 70's and it was an instant hit, especially if you had to do a job up a mast. It's such a shame that you get caned for replacement batteries or they change the shape of the connector yet again. Another great video Scott.
Haha the cord alone would have been a right pain in the ase up a boat mast haha
That vacuum looks great.
Kick ass. As long as makita is your primary tools. I’ll keep watching. Woohoo
Hey Scott. thanks for the vid. Always a good watch. Remind us about that pry bar please 06:59.
He may have got it from Gaston at or from Parana tools. Wicked tools he has yes. Tho I'm just guessing.
How it works with the Amps (or better amp-hours):
2.5 Ah battery: you can (theoretically) draw 2.5 amps at the given voltage (18/40) for an hour out of the battery before it is empty.
5 Ah battery: you can draw 5 amps for an hour.
As it is multiplied (Ah = amps x hours), you can also draw 2.5 amps for 2 hours out of the 5 Ah batteries.
So Ah is a measure of capacity, not of how strong the battery is, and is only comparable in one voltage class (20V 2.5Ah is half capacity of 40V 2.5Ah).
Because of the internal structure of the batteries, it's often better to use batteries with a higher Ah rating for tools that need more power (think angle grinder, hammer drill, saws)
I hope that makes it clearer, feel free to ask if not
The Makita 40V has the same number of cells as the 18V LXT. So for a given number/type of cells, for example, you get 40V at 2.5Ah or 18V at 5Ah. Note that while people refer to "5 amp battery" it's really a 5 Amp HOUR battery, referring to capacity. A 4 Ah battery can deliver 4 amps of current for one hour, 2 amps for 2 hours, etc. At least nominally (given test conditions). (The voltage rating is nominal, 18V and 20V are essentially the same given various test conditions)
9:25 "I don't know bro, I'm just making it up"
Man! I can only respect that😂.. That's so honest
I've been almost completely cordless for the last eighteen months. My Skil Mag 77 gets called into action every now and again for ripping structural timber. Apart from that i'm completely cordless. 2.5 ah means one amp of current for two and a half hours, 4ah means one amp of current for four hours, 👍🔨
FYI about the 2.5 Amp of the battery. I believe it's Amp-hours, which is the capacity of the battery.
As an example: if your tool uses 1Amp of power you could use it for 2.5hrs of constant use. If it uses 0.5A, you'd get 5hrs. Each tool is going to use a different Amperage
The reason why you can run longer the 40 V 2,5 Ah is, because it stores more energy. The power what is capable to deliver is the multiplication of voltage and current (40*2,5 ). Plus you are runing the tool on higher voltage can lead more performance -> quicker work, therefore you run the baterry for shorter time.
The way to think of Amp Hour is like water pressure, the higher the AH the more time you can constantly operate at that output. Which is why when you have a circular saw with batteries that have one bar left they may rip 9mm ply but anything else with higher resistance because there's no pressure behind it, yet if you put it in another tool doing a less strenuous job it will be fine until it's completely empty.
Voltage is the water "pressure" .. current is the "pipe diameter" controlling the flow... thats why high amps demand by the load need heavier cable & its also why US 110v systems require twice the current capacity in cabling as european 240v for a given load... its all about ohms law... volts X amps = watts.. double the voltage & you halve the amps...
😎👍☘️🍺
I have that Milwaukee table saw, it's amazing.
Love the vids Scot
For all my tools, I tend to get them with the Battery + Charger --> I now have a DeWalt charging bank of ~6 chargers = No down time :D
You think of the amp hours as a fuel tank of power to pull from. The 2.5 can deliver 2.5amp at any given time. The 4 can deliver 4amps at anytime.
BUT, because the volts don't change and the current(amps) the tool uses doesn't change (let's say 1amp for ease).
The larger battery just lasts longer due to having a larger amountof power storage.
Think of the battery as a 2.5l and 4l water bottle. Both release water at the same pressure (40v) but you can only open the tap to release 1L per hour (how much power the tool consumes) on both bottles. 2.5L will take 2.5 hours to empty and the 4L will take 4 hours to empty.
Running a site with no power now. Cordless framing guns and 2 saws and ton of batteries I charge every night. 8 amp batteries in the two dewalt saws last all day on one battery. If cutting plywood than I usually change 3/4 way through the day. I have 4 8 amps. 5 amps are good enough in the nailers. Have 8 of those and two guns.