i have a some I salvaged from dead laptop batteries, but they die eventually

or the LiitoKala ones if you want to go cheap

Depends on dead batteries

If you got ones that came discharged you're SOL

But recently I got one for 5 dollars that comes from a laptop that got broken, and it was near 50% charge

So perfect for storage

They work great and are powering my 6 cell powerbank

some had low voltage but they got 4.1v easily

https://www.gearbest.com/accessories/pp_1362169.html

these genuinely look like a death trap

but if you use them a little, they die after a while

>stepping on li ion pouches

yeah okay

Not in my experience, it's luck/informed purchases

I got one battery that had terrible cells

Rest charges to 4.18v, so all's well

and the voltage doesn't fall considerably

what's your routine for checking cells?

they look great if you ever wanted your own land mine

@ludverk blf a6 + samsung 30q gogogo

depends on yoru budget tho

nvm if its going to be in your car i'd get something bigger

i don't know, it was a 6 cell HP laptop battery that was clearly dead. most of the cells were 0.8v, some were 2.6v. i jerry riged something to revive them. just a 18650 holder with one of that little charging boards glued together. worked OK, most of them got 4

4v or more

i tried to make a power bank with the 2 with better voltage, but it doesnt work very well

if below 2.5v, throw away

sec

i going to check those samsung

Ok

PROVEN STEPS

1. Measure cell voltage, if lower than 2.5v, throw away

2. Charge. If they get hot, throw away

yes yes

more deals

<:pepestressed:327933525124841482>

3. Measure voltage after charging. If not 4.1-4.2V, throw away

4. Wait 30 min. If voltage fell under 4V, throw away

@Tervy im seriously considering those dragon balls

I don't know what I'd do with them

5. Store in a cool, dry place for 3 days. If voltage fell by more than 0.1V, throw away

And there you have it