How to Charge a Battery--lead acid and lithium-ion batteries (2021)
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- Опубликовано: 29 сен 2024
- This video will show how to charge a battery (lead acid and lithium-ion), how to read battery rating and what features to look for in a battery charger.
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12V Sealed Lead Acid Batteries:
12V 7AH Sealed Lead Acid Rechargeable Battery
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2 pack--12V 7AH Sealed Lead Acid Rechargeable Battery
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Smart Charger for 6V & 12V Sealed Lead Acid Batteries
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Fully-Automatic Smart Charger, 6V and 12V Portable
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14 AWG wire
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12 AWG wire
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What is the difference between a power supply, and a charger ?
Are they the same thing?
Some people say that the charger for a lithium ion battery in inside the pack itself as a BMS , battery management system.
For many years I have charged them at 10% of AH rated value for 8 to 10 hours, and had good luck and batteries last for many years, use a rotary timer to shut the charger off
ok my grandpa used those. good idea
For longest life, with either Lead Acid Sealed, or a Lithium Ion Batteries, charge slowly, 2 r 4 a. m. p. I use a 5 amp charger for a Interceptor 2 sealed jell 12 volt and 20 A H. N. B. 12200 NB12200
Hey, how many hours will it take to charge a 12v 18ah battery with this smart charger?
It depends on the charger’s current output. You divide 18ah by the charging current rate of your charger. Say if your battery is completely depleted and your charger’s output currently is 2A, it would take about 9 hours. If the current is 3A, about 6 hours, and so on.
@@diypotentials Thank you for the info 🤗
can i use a o-30 volt power dc power supply to carge a lead battery
No. Not a good idea. Thanks!
If the power supply has adjustable constant voltage and constant current modes, then yes you can.
You can limit the maximum charging current this way and set the float voltage.
Use a low Vf schottkey diode in series with the battery connection.
It's a good idea to attend over the operation regularly since the cutoff is unregulated.
@@kylec410 im going to have to look up how to do that lol. do you put the diode on the positive side in line? or would that be between the battery posts? it would be just one battery so im not sure why im wiring in series
@@chrhadden Definitely not across the battery posts as that would be a conductive path from positive to negative that of a short circuit.
In series with the batter positive is best, that would be the power supply positive to the anode of the diode and the cathode of the diode to the battery positive. The negative side of the battery can be connected directly to the negative of the power supply. You could have a diode in the negative in addition to the first one, but you would have two forward voltage drops in series with the battery meaning your power supply voltage would need to compensate for that.
@@chrhadden ask me anything you can think of, and I'll try to help.
I use a linear power supply to charge sla batteries, the design of the regulator(s) is what determines if you can switch between constant current or constant voltage mode as appropriate depending on the stage of charging
ALWAYS connect the terminals BEFORE you plug the charger into the wall outlet.
You are awesome! My brothers are all into computer/car tech stuff but are hard to reach so I’m so glad I found your video! It’s super informative and easy to follow! I’m going to watch all of your videos just to learn new things. Thank you!
Thanks for the nice words and I’m glad it was helpful…Best Wishes!
OK,
Charging several 12V batteries, and I do not care what the manufacturers say. You must use a constant current, constant voltage charger on SLA, AGM, LIPO, or any other rechargeable battery. Why? This makes the battery last much longer that if you used a regular lead acid charger of any type. Between Amazon and eBay, you can find practically any voltage charger in existence. But you must find a constant current and constant voltage charger to maintain your battery for long past its warrantied lifetime. Don't be cheap on the charger! Remember, you get what you pay for, especially with Chinese made chargers. LiPo batteries have a problem, some Chinese make outlandish claims on their battery capacities, some by a factor of four! An 18650 battery from China rated at 9800 Mah, have been checked out at less than 2,000 Mah on the bench. The weight of the battery determines the amount of current it can supply. If a 9800 Mah Chinese battery weighs less than a Japanese battery rated at the same current level, the heavier battery wins! Read the fine print under the ad giving the specs on that battery that looks so very affordable. Chances are that battery is a lightweight fake. (My opinion, my experiences). Oh, it may work well enough in a flashlight, but not for as long as they claim. Those bright yellow or red batteries ("eye candy") from China just do not measure up to Japanese batteries or some South Korean batteries. Look at the weight (in grams) when battery shopping, or for what its worth, in Wal-Mart and buy the heavier battery in its class (including car and marine deep cycle batteries). Bring a fishing scale of up to 60lbs if you have one for the heavier batteries. If a store complains, walk away, they have something to hide. In batteries, weight has everything to tell about a battery.
Thanks so much for this helpful information….
Question. One of my garage door batteries is rated 12v 2.2ah. I bought a 12v 2A charger, charged it for two hours but the voltage on the multimeter says 10.6V. Does this mean the battery is dead? Also after the charge, the battery temperature is warm.
I think so….
Isnt it the 2.2 ah/ 20 so the amp of the charger should be so .022amp charger
Can you use car battery chargers to charge these small 12v SLA batteries? (like from a jump starter battery pack). Thanks and very good video.
Jump starters put out hundreds of amps to jump start your vehicle. Not a good idea to charge these batteries with them.
@@diypotentials Hi. Thank you for your response. I didn't mean using the Jump Starter Packs...I mean using the 12v battery chargers for car batteries to charge these 12v SLA batteries.
@Steve Sauls thanks for the info.
@Steve Sauls Thanks again man. My car battery charger has a 2A charging switch; this should be ok right?
Thanks for the video but the last three batteries I do recharge. The charger I purchased was on QVC I think
Nice tips thanks, My battery is Gel Valve Regulated and my charger is 12v -6amps is that ok for a 30ah battery? Do you also leave a battery like Lead Acid or any deep cycle ones unused for a certain period of time is it safe to stock or store a battery as a Reserve power bank if there will be power outages in our area? Thanks
Hello, I’m wondering if I bought the black battery in your video to put under my driver seat and connect wires to power a siren for the car would that work?
If the siren runs on 12v, it should work.
I don’t understand the charging time formula so I’ll ask.
For alarm panel I have a 6 volt 1.3 amp rechargeable lead calcium battery. How long do I charge this for
Thanks
But where can I find the amps on my two batteries I have 12v 7ah and 12v 9ah because I want to buy adapter want to get the fastest charging adapter I can use.
How much time would it take would it take to charge a 12v 12ah SLA battery using the SLA smart charger?
I have a 12V 18ah battery. What is the best suitable solar panel to charge it?
thanks for the idea
I have a large Sears auto charger. It is stamped Output 12VDC 2/10 Amp. It has 3 settings manual, auto cut off-regular and auto cut off-deep cycle. I’ve used it to charge both my regular Car lead 12V and regular motorcycle battery. I’m sure it will work on the e-bike lead battery but what about a lithium battery?
I personally would not use a lead acid battery charger to charge my lithium batteries, namely because lithium batteries are so expensive and costly to replace. If i must, I would charge my lithium batteries with a lead acid battery charger, but on regular basis i would not. Even that, the charging current and voltage levels would have to be compatible. There are number of good videos on RUclips that highlight the different factors and characteristics of both batteries and that lead acid battery chargers might not do justice on lithium-ion batteries. Here are a couple to check out...
ruclips.net/video/6vTaCkTVl7I/видео.html
ruclips.net/video/EVQecXGjNkk/видео.html
Thanks!
I have lead battery with rating : 12v9ah. Shall I use 12v, 2A to charge? Or shall I go higher voltage (say 14v, 2A)? I don't think my chargers have a light for when a battery is fully charged. How to know a charging cycle is complete? Thanks!
Either charger would work. For a peace of mind, I would consider getting a charger with a light indicator. Thanks!
Where can you charge a battery can you charge it anywhere safely? I live in an apartment
I use (2) of these batteries in series to power a three-wheel golf push cart.
A round of golf normally lasts about 4 hours.
Should I charge the batteries after each use? You also recommended not overcharging them. My charger has a red/green light to indicate when they are charged. With this setup how do I avoid/know when to turn it off to avoid overcharging?
Once the indicator is green, you can stop charging. Thanks!
Thank you! I did not know a higher amp output could damage a battery!
Wondering how to charge the 7Ah SLA with a small solar panel cannabalized from a solar light from Harbor Freight. Do I need a solar controller? Can I just connect the panel directly to the SLA battery? Good video Thanks!
I recommend using a solar charge controller…
very informative. I did not know the lithium battery pack will come with a bms and a charger port. I thought I had to find one with it.
Thanks!
🔥🔥🔥🔥
Battery price
Thanks, very helpful. 65 year old single woman that is not smart about this stuff.
Thank you!
Can I use a 12v, 3.3ah charging adaptor to charge a 12v 7ah lead acid battery
3.3A charging current for a 12V 7ah might be too high for the health of the battery. I recommend 2A or below for that battery size. Thanks!
When you use 3 12v batteries wired in series to make a 36v bank. Do you take it apart and charge each 12v battery separately? Or can you charge all of them together with a 36v charger?
You can charge them all in series with the 36v charger.
@@diypotentials awesome! Thank you so much
What about the opposite? Can I connect my big 12V auto charger into parallel connections to 3 12V lead batteries ? So Red has a line going to each (+ )terminal. And a Black goes to each Black (-)terminal on each battery. Twist all 3 red together and all 3 black together. Then connect Red+ Black to charger. Simple
Thanks for the video. I just recently bought 2 12v 10ah lithium batteries. Do I need to charge them out of the box - or do they come precharged?
They should come pre-charged. But you can check their state of charge by charging them. The charger should show if they are charged or need to be charged. Lithium batteries are happy at around 30% to 80% state of charge. Avoid fully discharging or 100% fully charged…
@@diypotentials Thanks!
Also Is the a adapter for the adapter instead of connection I can connect a connection that has alligator clips on the other end??
Hello, you can find the chargers on Amazon by searching for 12V SLA battery charger. I don't recommend fast charging your batteries because it can damage it over time. The most charging current I would suggest for those batteries you mentioned would be 2A. It does take time to charge these batteries. Here is an example that is suitable for your batteries...amzn.to/3wQLpNF. I hope this helps.
I am building a moped with 4 12v lead acid batteries. It will be 10ah at 48v. How can I charge all those batteries at once? Thanks.
It is better to charge each one by one. To charge them all at once, you will need to charge them with a 48V lead acid charger. It might be difficult to find a 48V lead acid charger, though. Good luck on your project.
@@diypotentialsi made a 2x 12v 18AH lead batteries in series.. would i require a 24v charger? also how many amps should i set my hota smart charger to charge this setup
hi i have a container thats made for the bike, it has 2 batteries in it. i replaced one old dead one with a new one and charged it 2 times for 10- 16 hours but with one old dead and one new one i only have 1 minute of charge? why do i need to remove the old one form the container. or does it have to have 2 working batteries in the case
I would not mix dead batteries with new ones. If the batteries are connected, the dead ones will restrict current from passing through to the new ones. Thanks and good luck.
Thanks a lot!
Nice 👍
How about gel type batteries?
So if I have a lead acid battery, I use 12 V to charge it right?
Yes, if your lead acid battery is a 12V battery, and the charger is rated for 12V. Thanks!
Very helpful 👍 🇺🇸
hi, can you charge a 12v9ah lead battery with a charger for a 12v10ah lithium charger?
The charger is rated for 12V with 10A charging current or do you mean your lithium battery is rated at 12v 10ah?
@@diypotentials the lithium battery was a 12v10A and I wanted to use the same charger on my new 12v9ah lead battery.
@@indigenousliving3658 It should be okay to use the charger on that lead battery. Thanks!
@@diypotentials thanks much appreciated 👍🏾
Can the lead acid battery or lithium battery work the dc flyback driver ?
How long do you charge a dead dead battery ?
Hello, assuming that the battery is still taking charge, it would depend on the battery capacity, and the charging current rate. You might have to charge it and time it to get an approximate time. Thanks!
You'll most likely need to jumpstart the charging process before the charger will recognize that it is even connected to a dead dead battery that needs charged and with that said most chargers won't even begin charging.
I didn’t charge my kids power wheel battery for one year the batteries dead can I still charge it?? It won’t charge with the charger
Yes
thanks for help
Thanks!
(AH) Amp Hours has nothign to do with time. 20 AH wil not last 20 hours....
He didn’t say that
Pls connect to wall 1st n power up b4 connect to battery.
What if u don't have a smart charger that doesn't shut off when it's full? How long for a 500mAh for 12votl 8a
I recommend using a multimeter to measure the voltage level every so often until the battery reaches 12.6V.
good work
Aren't you supposed to disconnect the negative first, before the positive once it's charged?
Do you have an answer ?
Positive is last to connect, first to disconnect..
Good catch! That is the correct way of doing it. Thanks for pointing it out.
@@diypotentials You're welcome, keep up the good work!