Thread: 18650 Thermal Batteries

If you can use non-protected batteries in your devices, I've bought from this seller before when building up battery packs, good to deal with and honest about products (2nd hand). I've always gotten at least 90%,typically 100% of rated capacity from cells I've bought from him.

https://www.trademe.co.nz/a/marketpl...ing/5129563756

Also if you are in Chch Ecotech Services sells used Li ion 18650 cells in good nick, a couple of bucks each. I've bought many from them for various uses, some I add a protection circuit if needed, its not difficult.

Originally Posted by bjp

If you can use non-protected batteries in your devices, I've bought from this seller before when building up battery packs, good to deal with and honest about products (2nd hand). I've always gotten at least 90%,typically 100% of rated capacity from cells I've bought from him.

https://www.trademe.co.nz/a/marketpl...ing/5129563756

Also if you are in Chch Ecotech Services sells used Li ion 18650 cells in good nick, a couple of bucks each. I've bought many from them for various uses, some I add a protection circuit if needed, its not difficult.

Thanks for this. I just bought 20 off your bloke on Trademe for $52 landed.

Originally Posted by Tahr

Thanks for this. I just bought 20 off your bloke on Trademe for $52 landed.

He actually credited me $7 so cheaper still. $2.25 each delivered.

At that price you don't fell so precious about them, aye. I've got a little powerbank case from Aliexpress that can take 1 or 2 (they are in parallel, so doesn't matter how many), so can then just carry loose cells and use them in headtorch, thermal or to charge phone, whatever is needed. At the moment I just place masking tape over the ends to avoid short circuiting, keep meaning to find a storage case. Though just had a thought, I might just stitch up a bit neoprene a bit like a shotshell holder... definitely wouldn't want to risk short circuiting one without built-in protection!