Explained for BEGINERS Lithium ion Battery not holding charge How to Diagnose and FIX 

Finally a explanation a numpty like me understands. Good work mate

Very good explanation great video

Excellent. Thanks.

That's quite a clear explanation! Congrats!

good video. TY. Will you be making a video showing the actual battery replacement process?

EXCELLENT VIDEO, THANK YOU FOR SHARING. 🇺🇸 IS ❤

Good work

Thanks a lot im a newbie about repair battery it can help for me this clear video Sir Hope next video the battery of Xiaomi mi365 how to diagnose it is the same process?

So… are we just not gonna talk about that flash light sized sharpie marker? Lol That thing is huge!

thanks

Nice video👍

Just as you can measure the voltage of individual blocks of 3 you can charge individual groups and I here would charge them to get the top bank to 3.94v each to match the lower bank. I would then put the battery on a shelf somewhere and wait a week and measure again. This will help work out if the low cells have a self-discharge problem or if they went flat because they have less capacity that the others which is terminal. The BMS will try to rebalance cells but, if you have not used the battery for a long while, self-discharge may have taken some cells so far out of balance the BMS can't fix things.Sometimes re-balancing all the cells to the same charged voltage will make the battery usable with improved range once more - for a while.

Hi. I have a lithium battery pack of 6 which puts out 7.2 volts, it charges but the charge doesn't last long only around 5 minutes,i have the same battery packs that last 20 minutes What would you suggest to do to get it back to a proper out put? Many thanks Spike.

Do you consider problematic receiving new lithium ion cells at 3.44v? I received my new 21700 Samsung INR 40T3 4.000mA, 35A cells from well known european company NK.. with 3.44v. Is that too low? I've builded an 2.8 kw 24s8p battery for an electric paramotor and has a huge voltage drop at 10-17kw full throttle and it should handle it like other similar batteries. I'm trying to find out why. Thanks.

Good video sir, Thank you.. I have one query to ask you, i purchased some lithium ion battery that are measuring different voltages for example some of them 3.6V, 3.8 V and 4.0 can I mix all cells together in parallel connection?

i need help i have a bms which had low batteries,i disconnected the bms and i charged them all up to 3.7 so they are all balanced the bms gives 48v at the charge connector and 1.6v at the power connector...is the bms dead ?? or does it need reset or something i dont have 52v charger.

Please connection for bms 30 battery

My 48V ebike battery shows nothing on charge indicator on actual battery. When I connect battery to bike no power, when I connect wall charger to batter nothing just green light on wall charger indicator? Any suggestion to resolve this or is there a shop who works on these? I hate to toss battery as its only 2 yrs old with little run time very few hrs.

on laptops if you change one cell the bms will cut the power and you have to reprogram it to fix the battery, in scooter doesent do that? you can change them with no problem?

If we know we have a problem why has it not been fixed

How do you know how many volts are meant to be in each single battery when you test them .very helpful video thank you

What about a 52v samsung celled lipo battery thats not charging past 80%? Bad charger??🤔

use a hobby charger.no bms as charger balances every time,reads cells and uses larger BMS to even pack..mind you 48 volt not good product..36 volt or 24 volt great

Does somebody know what IS wrong with My scooter battery. One cell is full 4.2v and every other is 3.6v. itse 42v battery

what happens if i remove the bms?

my battery is 37 volt battery. The actually volt is 34 charger wont kick on. Does this mean my battery needs replaced

How do u reset the bms

You need good electric knowledge to do this kind of operation or your batteries can burst in flame 🔥

If you use average cells. They will fail. If you use a hobby charger you can stay ahead of the issue with bms DEAD IN WATER

Perfect example of Reason to NOT use bms

Its not a REAL battery its just a clump of cells.

No efix explained at all. No help.

Good batteries Run Naked

Can you just toss the bad cells and hook the remaining cells back together?