Revive dead ebike or lawn mover batteries

Yes, it is possible to revive most ebike and lawn mover batteries
-- More information below! --

For those batteries sitting over winter or just left the main issue is the BMS shutting down due to low voltage. In this video we take a look at how we can get them going again.

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[airlinephoto]

Done exactly this on my ebike battery and it recovered. Left it over the winter and killed it. Now all good. Ty for the help.

[harasti]

The most informative video, really help to repair some battery pack sitting dead in my workshop.

[MCsCreations]

Really nice, dude. Weird that the cells discharged themselves! Even more weird is the fact that the BMS won't recharge in this case.

[bewaktembaga]

Damn what a great solution, i wish that i found your channel sooner. Truely this is really good stuff.
So can you give your suggestion on how much time would you take as the mininum and the maximum time limit for charging each one of it?? I'm truely need your advise, base on your understanding and experience what would you recommended as the minimum and the maximum time range to take so that im not gonna harm it by charging it to long or too short.

[mct]

Are the connections you are making at 5:45 equivalent to charging using the discharge cable?

[BramStolk]

Do you have a recommendation for a bench power supply? Thanks!

[tonyleal]

Where can I buy the parts to make an adjustable charger like you have?

[aaroncorfield]

Im gunna try this tomorrow as a new battrey for my bike is 200+ so if it works its a bonus thanks man

[Americadoe]

Hi! What needs to be done to make sure that the cells get balanced properly after the charger is able to charge them.

[Stevelites]

Could you do this with a standard multi voltage 1000ma PSU or using one battery that's fully charged?
Spacey bar 🖖😎

[danv]

QUESTION:
I am trying to revive a 52V 20ahr ebike battery that I let discharge over the winter months. I have a power supply connected (set at 52V) to the pack leads. I started charging at .5 amp and over a two-hour period have increased to 2.5 amps.
What do you recommend for a charging amp rate?
The battery came with a 3-amp charger that I will connect when the battery reaches 52Vif it doesn't catch fire ha ha.

[robotechnical]

Can I bypass the BMX with the original 36 v charger. By slicing the wire and use small clip wires to connect the whole 36 v batteries for 15 min

[daviddurden]

Where can I send my Panasonic 48v for that type service? Mine sat for 8 months ?

[benjamindalton]

I'd like to consult with you about a LECTRIC e-bike battery whose charging port got wet....

[gamalielgarcia]

what kind of balance do I have to use for a 24v Power wall? It has 1025 .64 watts. 7s 18p nominal 25.9v. What balance should I buy? It's for a solar system

[xerejuneseve]

You charge until the charger disconnects, wait 6 hours, discharge slightly and then charge fully again.
A few of these cycles will balance the cells.

[pirelli]

Hello one question: I saw a video where someone measured all the Li-Ion cells of an escooter individually.
3 cells had about 2.8 volts and all others 3.4 V. How does this extreme drift come about, how can it be prevented???

[jamesbondaygee]

Okay this is very cool. What kind of power source can I use to get these battery cells up to a acceptable level for the bms?

[pjgolden]

Brilliant ! Just what I was looking for, thank you!

[kenattagexp]

Love your channel. I am building a off-grid, solar system with 48v battery bank of 18650s. So far, I have 180p14s (2, 520 cells) yielding 390ah @ 48v. I've set my Midnite Classic 150 to shut off at 47v (3.36v/cell) and battery on at 54.6 (3.90v/cell) yielding about 60% DOD based on 4.2/cell -> 3.0/cell for 100%. Battery University (and other bits) indicate 60% DOD lead to 5, 000-6, 000 cycles before cells drop below 80% capacity... but info seems a bit fuzzy. understand that if I went to extremes like 25% DOD instead of 60% DOD I'd extend my cycles to 10, 000? or 15, 000? - but 25% DOD is only 5kwh where as 60% is 12kwh (in my case).
I have my controller set to a range of 3.90v -> 3.36v/cell (58%) assuming 4.2v -> 3.0v (100%). Do you have any thoughts / advice on this? What is reasonable DOD? What voltage range do you use for max/min? Do you do full charge (to max) before allowing battery drain or just set 1/2 way (say 3.6v/cell) for inverter on?
Any info / thoughs appreciated :)