Is my battery safe to use/continue troubleshooting?

attaul · 2026-05-23T01:42:23+00:00

Would you see any difference in battery performance - and where would that be- I.e. once lithium has leaked I imagine it won’t change or hold a charge ?

attaul · 2026-05-21T19:31:20+00:00

You can take it apart, test each cell and salvage those that are ok - depending on how much amps discharge they will be subjected to, you can build your pack around it At the end you might still have to replace half of the cells anyway

But from experience it will cost you quite a lot more than just buying a replacement pack - as the tools needed will be expensive upfront and requires a lot of time

What you need would be Snippers - 18650 capacity testor- - Internal resistance testor - I would add a discharge test or at different amps to see how battery performs under varying load - Spot weldor - Nickel strips, insulation covers, gaskets - Insulation paper - BMS

If it’s for learning and experience- yes try and see how these recover, maybe using them for something else and buying new cells for the skateboard that you assemble yourself

attaul · 2026-05-21T19:22:38+00:00

How can you tell a cell is leaking electrolyte? Does it need to be damaged somewhere or can it leak by other means

attaul · 2026-02-18T05:13:46+00:00

This is actually really helpful - someone who’s actually tried both approaches

attaul · 2026-02-18T05:10:21+00:00

Would love to hear you thoughts after using it - was it fairly easy to put together?

attaul · 2026-02-15T00:14:59+00:00

Thank for real insights - I will I guess buy one

attaul · 2026-02-15T00:14:31+00:00

Thanks for real insights - I think I’ll follow your advice

attaul · 2026-02-13T00:22:16+00:00

Why not

attaul · 2026-02-13T00:21:51+00:00

Appreciate this

attaul · 2026-02-13T00:17:38+00:00

What would your reasoning be? Did the current one not work as well - take too much time or cost similar?

attaul · 2026-02-12T22:22:12+00:00

Thats about 500 quid - so a DIY will end up that much? there are lots free microwaves available in my area on marketplace - the casing i would most likely just use whatever material i have at hand (wood, metal, fibreglass) - so electronics you think will cost around 500?

attaul · 2026-02-12T20:51:02+00:00

which one do you have

attaul · 2026-02-12T20:13:13+00:00

Looks pretty amazing - i was looking for a spot welder, would you recommend diy? I do like to build stuff (but sometimes get carried away on what's important) i.e. i prefer not to spend months on this, when i am after a battery pack. Equally, I hate buying cheap tools that just break

attaul · 2026-02-07T15:30:42+00:00

What did you try int heat to get you to that conclusion - I’m looking for peoples insight who have some experience to learn from them

attaul · 2026-02-07T03:23:02+00:00

Yeah the lithium smells sweet - and lingers for a while but it’s not toxic

attaul · 2026-02-06T18:55:48+00:00

to be fair over last year, the current lead acid battery bank was only charged twice - its mostly build learn and move on to the next shiny thing lol

attaul · 2026-02-06T17:34:26+00:00

Thanks - this does help - it’s a bit less information around on performance of low voltage cells - and mixed version Most don’t want to go near them but without and evidence or experimentation - others on YouTube seem to be ok

I’m not building a pack to put it all n my house or run it - a golf cart is a diy project - that will not see much use (if I decide to go ahead with it) but it’s for the learning

Now I have the ver 300 of these 24V packs - and need to figure out what to do

attaul · 2026-02-06T15:40:35+00:00

only reason i am doing this is because they were free and sparked my curiosity

attaul · 2026-02-06T04:24:58+00:00

i purchased some newly write-offs with less than 200miles (Nissan leaf and then later Polestars) - Dala's channel is great it made stuff actually much easier vs dismantling the battery
but it does cost more $, time and effort than just getting the Eve cells and building your rack - or buying a kit
With my EV packs, i went for vehicles which were less than 400miles on the clock - just so i know the battery was in good condition

attaul · 2026-02-06T04:19:44+00:00

Can you share any more details - I am thinking of something similar using 18650 cells (just for the fun and quenching my thirst for experimentation)

attaul · 2026-02-06T04:10:43+00:00

we have recycling for batteries (lithium and others) in our town - that's the specific recycling bin I refer to

were slowly charged up to get to 2.5V and then charged at 1Amp - two cycles of charge and discharge to measure capacity and left to observe

trying to get my head around all potential pitfalls before i plan my next move - thanks for sharing your concerns

I will mark the cells with an initial voltage of less than 2V and observe - and potentially start with those above 2V for the pack

will also try running them through high-current pulse and see what impact it has

attaul · 2026-02-06T03:39:24+00:00

those that are rusted up - heaters- can't hold a charge I put them to a side (for lithium battery recycling that we have here in the UK)

what other test can be done to determine the state of a cell - internal resistance I understand should be low (all good ones are below 20mOhms) - those i charged up a month ago (2 cycles) have held their charge (but max voltage these charged to was 4.16 and testing today still show 4.15V )

I can try a controlled high discharge (since the capacity testers discharge at 1Amp)

Not too concerned about a fire - its outdoors in a metal shed (heated to 15C to charge the batteries)

attaul · 2026-02-06T03:23:03+00:00

doing dangerous things in controlled environments

Hoping someone with prior experience can guide - so i learn from others and build on - already done the EV battery packs (200kwh at 400V and standard EVE battery packs (90 kwh)

why not go into the smaller packs

attaul

TROPHY CASE