
What can I do to make any of this useful?
What I have that I don't know what to do with
- 64x 18650 cells (3.7V, 2.2Ah, 8.14Wh each, 520.96Wh total).
- 2x https://www.amazon.com/dp/B09S3LZN2Q?th=1
- 1x https://www.amazon.com/dp/B09S3JRFDF?th=1
- Daranener NEOZ with a bad BMS (won't charge, blinking blue LED on the board inside), but the battery cells seem good.
- Outside of Power Station, the pack is reading around 18V
- The batteries are 14x 26700 cells (3.2V, 14.4Wh each, 201.6Wh total) in what looks like a 7s2p configuration.
I'd like to make use of these cells in a cost effective manner.
I have a Pecron F3000LFP which is possible to add a 3rd party expansion battery to, if you build a custom terminals-breaker-XT120 cable to connect the battery and Pecron.
Ideas with limitations
- I could buy two more snap-in PCBs and make one large 12V Power Bank, that I don't really have a use for. ~$40
- I could buy two more snap-in PCBs and three more BMSes to create 4x 12v packs, put them in series for 48v, and connect to the Pecron. Super Jank. ~$120-$140
- For 2x the price of doing the above, I could just buy a 48V 25Ah battery for the Pecron. Doesn't actually solve the above issue. ~$225+
- I could just buy a spot welder. But then I'd have all these cells and a spot welder and still not have a use for the cells. $50+
- Build new power station with the 26700 cells, but the rest of the components are usually the more expensive aspect.
- Either the components of the Daranener aren't salvageable (custom PCB with everything on it), or I'm not knowledgeable enough to reuse them.
What I don't need them for
- I already have 6-10 more 18650 cells for headlamps, Raspberry Pi projects, ESP32 projects
- I already have a server UPS that is the backup for my modem+server rack
- I already have too many power banks so don't need to make another.
Or do I just sell off the cells + PCBs?
I feel like I'm in between having too few cells to justify a spot welder for a bigger battery project and having too many cells for just making a simple power bank to charge my phone/laptop.
Thanks in advance