Testing and Review of the Jakiper PRO Battery, 5.12kWh, Part 1
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- Опубликовано: 10 дек 2024
- 5% Discount code: DAVIDPOZ
Jakiper (Orient Power) sent me some of the new "PRO" batteries for testing and review. I spent 1 week putting it through some crazy paces to see where it fails, and where it holds up. This is Part 1 of testing this battery.
This battery is part of the Jakiper line. Model# JK48V100PRO Server Rack design. The cell chemistry is LiFePO4 (Lithium Iron Phosphate) which is the leading chemistry for home storage. Each battery works with 48V equipment but is technically 51.2V nominal, 100Ah. This means you have 5.12kWh of capacity.
There are 4 capacity tests, a freezer test, and load test.
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Orient Power Main Page: www.opsolarbat...
Jakiper PRO Battery: www.opsolarbat...
Rack with 4 batteries: Get a deal when buying the set of 4 with a steel rack: www.opsolarbat...
Powerwall battery is the newest version and hangs on the wall if you don't have a lot of floor space. The specs are the same as the server rack design, but in a vertical package: www.opsolarbat...
4 AWG (4 gauge) wires for connecting your batteries together: www.opsolarbat...
Rack alone: www.opsolarbat...
CC/CV charger for battery. (constant current, constant voltage)
www.opsolarbat...
Correction, there is no free shipping.
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Disclaimer:
My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.
David Poz, LLC
Well, props to Jakiper for sending you a no-strings-attached pallet of batteries for you to review. That must speak to some integrity on their part. And I appreciate your objective review!!
Wow... you went above and beyond to make it deliver those 100 amps! Great video as always 👍
Thank you for appreciating the week I put into testing this battery.
Why use batteries? That epic beard has all the power you will ever need.
Thank you for all the information you're one of my favorite RUclips channels
some of my eg4’s came with the same issue as far as capacity. Signature Solar’s response was to run them like normal until the bms regulates all the cells. Which does technically work.
Long time self discharge may let cells carrying different capacity. This type of BMS regulating current in charging time is 40mA.
Running as you will use them has always been a valid approach. The passive bleed resistor is only turned on as the cell reaches about 3.5 volts. Yep it moves a whole 40 mA or less as noted below and They seem to fall behind in use..
Glad you got ahold of these to do a review
Thanks for watching.
Thank you for another fantastic video. I continue to learn more about these batteries and I am grateful for you channel.
Your welcome. I'm glad the videos help.
Excellent video! Your explanations, visuals, and pacing make all your topics interesting and easy to follow. Thanks for all your hard work and for sharing your expertise.
Love seeing the evolution/progression of your videos. Keep up the good work.
Thank you David. Great job explaining 🎈
Dude! You have gotten really good at explaining things. That was one of the most consumable technical videos I have ever seen. Great job!
Thank you. I'm glad it was easy to follow.
Excellent review, very detailed.
Pretty intensive work to get into specs.
Proper job.
GRATE VIDEO!! Love how much work you put into your videos. Thanks for sharing. God Bless brother.
Nice video. Been learning loads from your videos. Have ordered a few items I have picked up from your videos to supplement my setup but things are a bit pricey and I doubt your suppliers would ship out to South Africa. But your videos are awesome. Just very confused with the hair and the beard though. But looking great. Been waiting for the new video for a while. Keep up the good work.
Hey David -- just a thought. On your battery tester, you've got 1.07 crossed out. Add a QR code and an internal link to why you had the 1.07 multiplier in the first place, what you learned in order to not need it anymore, and educate us all along the way! I recall watching those videos, but have since forgotten exactly what the issue was. I think you had to cut a bit of the shunt out to get the readings more accurate, but I may be remembering it wrong. Anyway, awesome review, I always appreciate your earnestness and honesty and straightforward testing process. Cheers!
You remember it correctly. Here is the video: ruclips.net/video/fCRJ8XdPrn4/видео.html
@@DavidPozEnergy That's the one!!! You should put a QR code on your tester and the above URL so people can learn what you did and how! Thanks David! Woot
Wow ... that was thorough and done from a practical 'in use' standpoint. In some ways its good that you're not an engineer because an engineer would make all sorts of excuses. Thank You
Thanks, I apprechiate that.
Nice review. Weldone David
Thank you.
Makes a great case building out a battery with a premium BMS with active balance with custom voltage control. Buying raw cells I was able to build a 14KW battery for under $3000! A much better preposition than any server rack battery I have seen to date.
Have you got a video or a write up on how you did this? Thanks
Daisy chaining the batteries in parallel without using a bus bar rated for the current is a no no. So those plates on the terminals should not be an issue. I agree about welded terminals no chances for the terminal connections to come loose due to thermal expansion.
Would’ve been nice if they just marketed this as a 5 kWh battery instead of 5.1.
Ultimately its a very small difference, and price for kilowatt hour together with features it’s probably more important rather than what is the date hit that extra .1 kWh.
But I do appreciate you calling out specs that aren’t hit.
Most excellent review.
Thanks for watching.
Hi Dave Thanks for the thorough and depth of the information with your video. My kids and myself enjoy watching them. Do you think this procedure can improve or increase the FCC (full charge capacity) to 100AH if it has dropped to 75AH?
Maybe, if the drop is due to unbalanced cells. However, if the 25% reduction is due to cells degradation due to age and cycles, then no.
It's pretty standard that they use the actual cell temperature for low temp protection. I definitely would prefer to see 0F.
Thanks for your feedback.
@@serverrackbatteryusa Is this setting still configurable with the software in the PRO battery like it was in the original?
Great Review!!!
Thank you Joe.
Have you tried the software on these server rack batteries? I am interested to know if they installed a "smart bms" with the ability to change "charge balance" to "static balance" otherwise I would have to purchase an additional smart balancer in order to keep my $2000 battery balanced!
Great review thanks!
Dave, you go the extra step in investigating the inner most secrets of these manufacturers. They try to produce a good product for us at a good price by using the cheapest components they can find. I don't fault the company for what they have put together, but I still find the price point a little high for what they have produced when you compare their battery to an EG4. Competition will most likely lower the price to something more acceptable.
heya, I dont know how good this company is, but for my opinion they should have top balanced those cells so you get what they are advertising because now we know it's not the cell's default but the bilders of these batteries
I assume that after several charge/discharge cycles that the BMS would have evened out the cells and you would have gotten the full capacity anyway, so I don't see your load tests as negative to the battery at all. I'm surprised they went cheap on the internal bus bars. Copper would have only been a few cents more given the quantity they use!! Do you know if the battery interconnect bars are the same? Thanks for a great review, great info, I'm on the cusp of buying!!
Great video
The cells should be balanced on arrival, and that internal bus bar is a potential concern. Do they use the same bus bar model for connecting the cells?
Is it possible that these new batteries need a few full cycles before they reach their optimum?
That is certainly the case with FLA
Hi David
When you will test the Growatt AXE 5.0 battery ? I’m anxious to that.
Do you think that after a few cycles or even dozens of cycles the BMS would have brought those cells into balance?
I don't think so. The balance function is only ON when the cells go above 3.5V AND you are charging with amperage flowing into the battery. This is a very short window, and assumes you are charging above 56V. I set my high-voltage to 56V on my charge controller, so in my personal setup the BMS would never have a chance to balance. But, if you personally set your charger to 58.4V, then the balance function will have a chance to kick ON, but it only adjusts at 40mA. Since the delta is about 2.5Ah, then you would need the balance function ON for 62.5 hours. But, the time a battery takes to go from 56V to 58.4V is very short. And, since the BMS was shutting the battery pack off at 56.5V, then you only had a 3-4 minutes of balance time. This means it would take just over 2 years to balnce out if you are fully charging every single day AND your charger is set to 58.4V.
Good day sir.
I wonder what are your thoughts on connecting a copper bus bar instead of the brass, would it preform better or cause over discharge of the battery due to the much lower resistance? I enjoy watching your videos. Cheers!
I recently gotten into batteries and setting up an off grid… thing. 6 months ago i probably would be completely lost but i followed along pretty well i believe. I’m just in awe at how many people don’t know what Any of this means.
You shouldn’t have to pop the lid and do a manual top balance on a new battery. The problem with a lot a BMS’ is “balance on charge only”. Balance should also only begin when the voltage is above balance “balance start voltage”(usually about 3.45vpc). This creates a narrow balance window(time) for a tiny 40 ma resistive circuit to do it’s thing. What you need to do is increase the working time when above balance start voltage by decreasing charge current so that the BMS just sees enough to keep balancing and not rush to full charge.That charger may be good but it would be nice the have a current adjustment for this purpose. Once it’s been top balanced normal cycles/use should be able to keep a good balance. If not, you may have to do a little maintenance balance again. I would hope that the battery has an app where you can actually watch the balancing is actually happening. I like to set my batteries at 55 volts bulk/absorb for reducing stress on the batteries however if your battery has a weak balance circuit and not much time at full charge the balance may go awry. In that case you may have to raise the bulk/absorption voltage to increase the balance time. There’s a catch too, going higher than 56v (3.5vpc). You may have noticed how quickly the balance spreads above the knee.
I just bought 10 of these. I plan on stacking 10 together. I would like to replace that busbar that’s not copper. How big should I get? Long? Wide? Thick?
To jakipers benefit: does anyone want their batteries to turn off if for some reason the environment dips to -5 for brief periods? (Yet the batteries are still -2.0C?)
Very thorough review. I'm happy with my EG4-LL batteries, though I haven't run them through many tests. Jakiper seemed like a decent alternative, but they obviously have some improvements to make. I hope they see this and improve, most of it can be fixed by top balancing and making some configuration changes with their temps, and switching to copper busbars.
Too bad about the first capacity test. Bummer. Do you think if leaving the battery "on" would the BMS top balance/equalize? Hate to think you would have to use battery balancer (that PCB with all the capacitors) to balance it out. Great review. Thanks for sharing
I don't think so. The balance function is only ON when the cells go above 3.5V AND you are charging with amperage flowing into the battery. This is a very short window, and assumes you are charging above 56V. I set my high-voltage to 56V on my charge controller, so in my personal setup the BMS would never have a chance to balance. But, if you personally set your charger to 58.4V, then the balance function will have a chance to kick ON, but it only adjusts at 40mA. Since the delta is about 2.5Ah, then you would need the balance function ON for 62.5 hours. But, the time a battery takes to go from 56V to 58.4V is very short. And, since the BMS was shutting the battery pack off at 56.5V, then you only had a 3-4 minutes of balance time. This means it would take just over 2 years to balnce out if you are fully charging every single day AND your charger is set to 58.4V.
Hi David love the channel. I’m currently starting a van build and also live in Massachusetts was just wondering if there is a local distributor of Victron that you would recommend so I could talk to someone in person and lead me in the right direction in my build. Keep the great videos coming. Thanks Kevin
Yes. Alt-E is located right here in Massachusetts. www.altestore.com/
I'm blown away that the BMS did not do that all by itself
Hi David, Windsor, CT is having a Sustainability Fair first Saturday of October. It would be so great to have a diy sustainability expert like yourself attend and provide some education to the people who will be attending. Let me know if this would be of interest to you.
Sounds like fun. Let's chat about it more. Are you on Facebook? I'm on @DavidPozEnergy
Dude, the beard!
How is that with these temps?
It's cranking on Long Island NY and I am just happening to be laying out some battery packs
73 🤙🤙
DE KD2HJP
It's pretty warm. Over 90°F this week. I'm inside my garage working on batteries, so it's not too bad. I have a mini-split conditioning the garage.
@@DavidPozEnergy I'm attempting to save for a garage mini split like the DIY Mr Cool one.
Since becoming permanently disabled, funds aren't quite the way that they used to be...
Consider the Heltec active balancer.
are you going to test the EG4 off grid inverters
Can the Jumper bar be switch to copper?
You could probably do something like that, but I don't think it's worth the time. If you are using just one battery, then the brass jumper is fine. If you plan to parallel a whole stack of 4, then check out my video part 3: ruclips.net/video/eWqJjlHoW9A/видео.html
Hi nice video, What if I add active balanncer to this battey will I solve the problem with different voltages?
The active balancer will fight the BMS built in.
All that for 3ah.. ok, cool. But 97ah is reasonable for a 100ah battery isn’t it? I actually worked in a battery lab. 85ah batts that we could squeeze 84ah of (very reliably, under flight conditions) were considered within spec.. Time = money. For our home storage purposes, 97 is pretty close. +- 3%. right? My concern is how safe are these batts for practical use.
Added: You really did a nice review. Lots of good thought and info. Funny how they use the brass bus bar instead of copper. Sign of the times and shows how precious the raw materials are in china. We are very fortunate here in the U.s. Will keep the politics aside for now. Nice job - Thanks!
Jakiper sent me 4 batteries total, and I only did the top balancing on one of them. I wanted to see what it would take to make it hit spec. For comparison, I made another video comparing this Jakiper to EG4 and the EG4 hit 100Ah right out of the box. You may like the comparison video: ruclips.net/video/uqBoNdAJKHE/видео.html
Hello David, Excellent videos ! Do you have any review or information about the Orient Power power wall battery? the price is good but I don't have any information. It's a new battery ??
The specs on the powerwall version look identical to the specs of this battery. I suspect the BMS and cells are identical. The difference is the package made to be hung on the wall instead of a server rack. There is more cost to the powerwall battery, so it's OK if you want 1 or 2, but any more than that and you have a better price point stacking the server rack batteries. I have an affiliate link to the powerwall battery and discount code if you want to buy it. (in description)
@@DavidPozEnergy Thanks David for your response. I will search for more info about this power wall battery. If I decide to buy it I definitely will use your code.
Can you list your crimper tool for battery cables also? 4/0 AWG?
The exact crimper I have is no longer sold. But this one looks identical to mine: amzn.to/3vtHKVo
Good review David. I have 3 of the previous model and while they work OK, Ive had some pretty serious issues with one of them staying balanced. Of the 3, this one inparticular goes into OVP nearly every charge cycle, while the others havent. Contacting CS, even though they have been responsive, they told me its working as designed. 1 out of 3 has a problem with balancing.,.. but its "as designed". BS. I have two cells in that pack that will go over 3.82v! I have to charge them slower now to limit the impact and OV condition. I think the BMS in these units are not very good. I was planning to purchase more, but after watching these closely I dont think I will.
Wow, that doesn't sound good. The BMS's in mine are shutting down at 3.7V. If yours is letting a cell go above that, then something is wrong. There is a software and password available if you contact them. I know you shouldn't have to, but maybe it's worth a shot to see if the parameter on the BMS is set wrong.
@@DavidPozEnergy Is there an active balancer in BMS?
nice review...
May I ask a question? If you were to continue to use the battery without personally top balancing it, about how long would it take to balance itself? Your best guess will be appreciated.
I don't think it ever would. The balance function doesn't turn ON until you are over 3.5V per cell. I set my bulk charging to 56V (3.5V/c) and float to 54V (3.375v/c). So the battery would never get a chance to run the balance out.
@@DavidPozEnergy Respect man, trust me that is a very top class video you did man.
I have 5 of the first generation Jakiper batteries. They have been great. And tech support has also responded and provided solutions. 👍
Thank you David for your channel.
Good to hear from someone who owns them. Thanks for letting me know.
Thanks
David, I have downloaded the Jakiper battery monitoring software. It is really easy to use and you can see everything about each battery. Individual cell voltage, overall health, SOC, etc.
Well worth the download when you are playing with these Jakiper batteries.
It also has the ability to monitor multiple batteries simultaneously. It totally rocks for a overall glance at my system. I love it.
Is that software something to use on a computer, and you need the computer connected directly to the battery?
@@DavidPozEnergy yes. USB to RS485a cable.
I have a lot of info about these batteries. DM me if you would like to talk. Thx
Do you have a way to test the amount of current is on the busbar during a 100 amp discharge using one terminal, because how do you assume 50 amps when a cooper wire of decent size is supplying the current from the battery?
There are 2 wires coming off the BMS to the negative brass jumper, one on each terminal. So if you pull 100A from one terminal you are going to be pulling something in the 40-50A from the second wire, which means it has to travel across the brass jumper.
@@DavidPozEnergy But I thought you said copper conducts electricity better than brass? Why would the electricity go through the brass when it has a direct contact using a copper wire to the battery?
Electricity will follow all conductive paths. But, based on the resistance of the total circuit you will see less amps on the brass, and more amps on the copper. But you will see Amps on both.
@@DavidPozEnergy So, at 28 percent conductivity would it possible for 72 amps on one copper wire from the battery and 28 amps on the other BECAUSE there is that brass busbar restricting the free flow of current?
What is your amp draw on high end for your house .
Can you test out the Sok server racks? would love to hear your views on them.
I don't have plans to test them, but Lithium Solar did an excellent review: ruclips.net/video/POf424nczxg/видео.html
DavidPoz hi man, nice work, all your products you use , can be purchased in europe... ? Also an simple question, can we live on OFF-GRID system fully for home 220 volt . Mean fully off grid .
Sorry, I don't know about purchasing in Europe.
With $60-100K, yes you can be completely off-grid.
yes these can be bought in the eu
eu.jakiperbattery.com/
Hi. David can you tell me what size breaker between battery and inverter I need for a 12kw grow watt inverter. I run 48 volt. Thanks for your help.
The minimum I've seen people use is a 250A breaker, but that is pushing it. You won't really be able to work the inverter to full potential with a single 250A breaker. Actually, if you follow NEC, there is a rule for oversizing by 25%. If you want to be very conservative you can use math like this: 12,000W/.88*1.25/48=355A That takes the 12kW output of the inverter, divided by 88% efficiency, times the 25% margin. For example, you could use two 250A circuit breakers next to each other, each with a 4/0 wire. That's what I would probably do. But I want to make sure I never "starve" the inverter for power.
@@DavidPozEnergy thanks will do
Are the bolted cell connections brass also?
So what’s your favorite battery for off grid solar?
This is my favorite battery: signaturesolar.com/eg4-lifepower4-lithium-battery-48v-100ah/?ref=4_rHcgZ9x-TiF-
Note: This is an affiliate link which will help the channel if you use it.
Is there an active balancer?
Awesome beard, bro!
Pretty gutsy of Jakiper to send you over six grand of their batteries. They were awfully confident, until they saw this video. You certainly can run your whole house for over a week without any sunshine with the battery bank you now have, and even another rack to put these in.
Hi David, I have a part Victron system but I have my system from vW batteries(EL).I have balancing(cels) but I dream about what you are testing.. :)
Probably unmatched cells?
Not being able to pull full capacity out of the box because the manufacturer didn't do a proper top balance is a no go for me. That's poor quality control.
Don't you think the real test of value is a long term (years) test? Given people are spending $10k or more on several of these and assuming they will last 10+ years, if the BMS, display, or one cell fails it will need to be completely replaced. Compounding that, this model won't even be around in a year likely. Compared to a few missing amp hours, this is a MUCH more important real world issue
David, u look like the Grizzly Adam of off grid ! Have to say Gyll is my choice.
Yes👍🔋 ⚡🔌💡
still very pro signature solar then david ?
Hey David You have some imposter on your channel with long hair and a beard making videos, do you know this guy?
great video on this battery. As others have already stated, if you keep using them, EVENTUALLY they will top balance themselves out. it will take many cycles, but it will get there.
PS, your discount code doesn't work.
So no battery should be used till it’s balance is correct?
I think there must be an active balancer for long-term use. Active balancer will remove unbalancing by letting the pack charge to 100% once a week. With an active balancer it would be enough to let it charge to 100% before first use. And the active balancer would take care of that. But I guess there is no active balancer here.
Few more inches on your beard and u will look like Grizzy Adams. Lol. Great video.
hello, we are looking for partner to try our 4K POE security camera system with audio and detection, we willing to sponsor the whole system to your channel, so any chance for us to work together? Waiting for your reply and get start.
Congrats on the video...it's incredible..though it's time to shave IMHO.
Wow I thought Grizzly Adams Was older :)
Lacquer thinner, or nail polish remover will remove that permanent marker that is scribbled on your amp/volt meter.
Use a dry erase marker instead.
its more than ok investment if need storage!!!! . wish i could afford so cheap rack in europe!!! + taxes goes double the cost!!!!!! and locals still charge 2k for unknown stat cells
you going to hook each battery to a busbar? Jumping 1 battery to the next will limit them to 100 amp. if you use a 250amp rated busbar you can achieve 200 amps or 10kw of power if needed since you have 2 inverters. I have 4 banks 280ah connected into 250 amp busbars so each bank will use 50 amp max or 2500 watts. Each bank with JK BMS (2 amp active balancer) cost me $2250. If took me 4 days to get a top balance but the BMS did it. I am not using 100% I have mine set for 90% I took 5% from top and bottom. which actually gets me 87% as I can not achieve a top balance each day. so 243 ah each battery 11,692 WH. I don't want to use 100% of battery to give them more life. mine have 6000 cycles so I am hoping I can get 8000 cycles or more doing this.
More or less excited than the "tower of power"?
Came here after a long time , you look like a different person.
That hair... The wife must love you a lot not to divorce you during these trying times... 🤣
I don't understand such nitpicking: author isn't using rated discharge method (Constant current). Instead used constant power. Also precision of this meter may be questionable. Tests performed without cycling for balancing (usally it's mentioned in manual that battery need some cycling for proper balance.
Regarding bus bars - no measurements of temperature and voltage drop, just some guesses if it's "capable" to carry some current - which is definition of this - temperature, voltage drop etc. - just tells his opinion without proper arguments
you from rgl?
Seems like a decent battery but at $500 per kwh in Canada just beyond my cheapness lol.
Has anyone tried to set their charger for 55 volts and left the charger with 55 volts for a few days. Not charging just balancing the packs to try to even everything out
Yes, I did. But, the balance function is only ON when current is flowing into the battery. If the charger is sitting at 55V, the current drops to 0V and the balance turns off. Actually, I think it turns off when the amperage into the battery drops below 1A because I was watching with my amp meter.
I think you should stop using Keeps… you are obviously a good brand ambassador for the brand 🧔♀️
At least you could get to 56 V with those. The trophy 220 only gets to 55.6 before OVP!! Also it will never take more than 20A while all 9 of my diy batteries are taking 37A. I'll never recommend or purchase another box full of junk culled cells. I bet your balancing disappears after 10 discharg/charge cycles.
I would hope Trophy installed a "smart bms" that has the ability to balance the cells and have a readout to tell the user that the cells are in fact being balanced so we don't waste our time trying to have the bms balance the pack even though the bms is not doing anything!
😎👍👌🖖✌🤓
My Jakiper battery is garbage! It goes into over voltage protection all the time at much lower voltages than advertised. I have seen it at 56 volts go into OVP. That is my biggest problem as it turns off and my other batteries end up at a different voltage. Customer service was zero help as well. Bad all around for me! Do not buy!
Mine did that at first too. Then I demonstrated in the video how I top balanced the cells.
@@DavidPozEnergy Yes I saw that and may give that a try. I just think it should come ready to use life my EG4 batteries. That is why I do not recommend them. Then the customer service just basically said give it time but I have been running for months. Great video though and thanks.
Other batteries avoid this by setting a really high OVP like 3.9V. Personally I'd prefer OVP to be at 3.65-3.7 and just have it turn off earlier if the cells aren't balanced.
Check the software of the BMS to find out if there is a setting to change for cell balancing. "charge balance" is bad and "static balance" is good or just see if the software can display something that indicates when the cells are being balanced. I would hate for you to be waiting a month for the cells to balance only to find out nothing is actually happening!
Using Brass bus bars? Now it is a Jokekiper...
Yeh I know you won't read this but one can but try.
Don't take a LFP cell over 3.4 volts when charging . That's high enough . Going further just gets into damaging the SEI so you need to read up on that again.
So 54 volts is where its at safely and 48 volts off. On the BMS you can take 100 Amps out OK but for the cells its preferable to never draw more than 0.5 C or in this case 50 Amps. You size your system based on this current flow.
Make it yourself price from China ,batteries About USD $270 is as good as I can buy a 12 volt ,100Ah battery so 4 needed here so From Ali Express you should be able to buy just the cells ,16 off for about USD $1800 so nearly $100 USD each for a 320 AH cell.
Shop around and ask lots of questions . Those deals are there but they will soon disappear I think, as relations with China degrade..
Bought their first gen. They revealed themselves to be dishonest disreputable disingenuous disgusting and disrespectful to their customers. I would warn people to stay far far away from this company. Read DIY solar forms if you don’t believe me. That form is full of stories from people who have run a foul of these scoundrels. Stick with signature solar.
Hello David, this is Mitty from Shenzhen BASEN, we are very interested in your video about battery! Could we have the opportunity to know each other?
You should not have to work that hard to prove the battery load shame on jakiper for bad QC
9999