XIAOMI PRO2 Battery - Repair 2 [Manual Balancing]

[@Darieee]

1st intervention: kzbin.info/www/bejne/pYvVm5Ska9yYeac 2nd intervention: this 3rd intervention: kzbin.info/www/bejne/opi5qaSXhMx3h8U

[@carlh2007]

I just bought 2 xiaomi scooter 3's for my kids and myself to scoot around on. Thanks for the vids if i have issues with the batteries what I have learnt from you is just buy a whole new pack and pull apart the old one for the individual cells :)

[@bardenegri21]

Loved the measuring three times part. I do this a lot when dealing with high voltage or batteries :)

[@Darieee]

ahye - my greatest enemy is indeed myself 🤣 glad to hear I'm not alone

[@khalilkh7389]

Great video and work 👍 Wich charger to balance this cell again? It will be ok with phone charger or? But Will it charging 4battery in Group?

[@AlinaAlina-bx8qx]

where can you buy that display that shows the battery capacity?

[@Andrey-Penza]

Уважаемый друг! Скажите пожалуйста-в этой батарее какая ширина зазора между банками по узкой стороне? Наверно не более 2миллиметров? Значит лирина между банками 18+18+2=38миллиметров Мне это надо знать перед покупкой такой батареи для самодельного проекта. Заранее благодарен.

[@brendanrandle]

might be a good candidate for one of the cheap active balance boards if you can't find the actual fault

[@Darieee]

sure would but .. if anything does go very wrong - there'll be a great chance of a good fire inside my wall-covered apartment 🤣🔥

[@gamblercosm2226]

I have 4.15v on every cel pack. On the top of batery i have 41.5v. On the main supply cabel (yellow jack) it shows 3.8v . It can be gone the bms?

[@MrPwnageMachine]

Don’t ever delete these videos bro I’m only 1200k’s in to mine and everything ok running 40A but I may need this video at some point 😅

[@Darieee]

no worries dude 🤘 I got you covered most likely there'll be a part 3 ... at which point I have no clue what I can do ... buuut ... that one might be interesting in any case -- I like to download the good shit off the internet -- it's rather unreliable 😂

[@maxinozka]

Thanks for video, I would like to know if I can use this battery without control unit just without 3 wire (white, green and yellow I believe communication cable) for electric bike. I am not sure if you know but maybe if you come across it again or you have it around and you can try to load it shortly without control unit🙃. Thanks in advance.

[@maxinozka]

Ok I see answer in repair no.3 so I can use it on its own. BTW it must be balancer. If possible I will just get rid of balancer but measuring system can load cell and cause your problem. It is in my opinion not balancing at all. I did not study those chips but I guess they balance on its own without communication and voltages measurement is independent otherwise it will balance until it is good. I had many batteries without balancer and they were after ten years the same! 2000 cycles for sure and I believe they had LG cells but maybe quality went down. I was discharging them in 10 minutes pulling 200kg. I do not believe the problem are batteries as I used some cheaper Canadian cells 8 years ago and they were balanced for well over 1200 Cycles until one cell failed. If it is problem with batteries it will be always the same cell as I build battery pack from different cells and it was always the same because I balanced every 100 cycles.

[@darioantinoro828]

Hello, i commented also the third part. I opened my m365 pro 1 and the battery is a little bit different. I don't have these jumper i don't know why. Do you think i can connect wires for charging on the metallic part where you test with the multimeter?

[@Darieee]

yeah, they sometimes move those pads around, but, if you can't find them, anywhere where you're actually connecting DIRECTLY to the cells is good

[@wesleyoates9723]

Great videos Great help Full of relevant info

[@thewell9785]

hello, i have a questions about cs8645 and csr usb spi. How to connect spi-en pin to csr usb spi ? Whitch pin on csr usb spi do i need to connect when im using pogo pin ? Thank you very much for your answer. Have a nice day

[@redafit4066]

If the battery is good and the scooter does not go a long distance, what is the problem?

Hello there, i didn't use my scooter for several months without charge and my range shortened from 20km to 3-4 km. I checked my cell voltages and I see that 4-5 cells of my battery are not on the voltage as expected. (around 3.7 on full charge.) I'm thinking to balance it by charging every cell with using TP-4056. Is that a good way to repair it without killing it completely? Voltages on full charge. Cell 1 3.649 V Cell 2 4.11 V Cell 3 4.066 V Cell 4 3.623 V Cell 5 4.111 V Cell 6 4.117 V Cell 7 3.978 V Cell 8 4.116 V Cell 9 3.965 V Cell 10 4.115 V

[@Darieee]

totally - rebalance all the banks with your 4056 and arm yourself with a few days of patience ❤️

[@ВладимирМузыченко-к5я]

Hi. Can you Help me. I can not find bms til elscooter xiaomi pro 2. Where I can buy. Thanks

[@Tugal01officiel]

I cant get the battery out its stuck in the metal box

[@Darieee]

cut more of the silicone on the edges

[@sssoyupak]

is the problem fixed? i have the same problem same battery and same bms

[@Darieee]

sooorta - now 2 other packs are lagging behind less so one of them is I think the one I charged externally (& decided not to replace) I don't know ... are you also running a custom firmware ? if so - how many W are you pulling from your pack ?

[@sssoyupak]

@@Darieee everything is stock As far as I understand, it is useless to replace the battery with a new one. What is the best way i am not sure what to do

[@franciscorompana2985]

XIAOMI batteries good for only 3 years max.

[@Darieee]

not so sure what to say about that - I had a client with 12 400 km, and 4 and a half years of daily riding ...

[@franciscorompana2985]

@@Darieee I mean mobile. I bought Samsung instead. Regards from Portugal.

[@Darieee]

ye .. most phone batteries are crap unfortunately :( try charging up to only 80%, and never i heat - that should prolong the life of a battery greatly cheers ✌️

[@express496]

Well yes and no. Surprisingly Huawei phones take extreme care of their batteries. My Mate 20 lite still lasts 1,5 to 2 days of use after 4 years. Xiaomi scooter batteries are the same if you aren't so aggressive with them. My PRO 1 is coming uppon 4000km, cfw (speed increase but no power increase + some creature comforts). If you want more power buy a more powerfull scooter from a reputible brand ...