I accidentally let my 24v LiFePO4 batteries discharge all the way down to 0 volts, and now they won't charge. I've been advised to use a DC power supply to give them a jumpstart before using the regular charger. Can anyone recommend a good DC power supply for this? Thanks!
3 Answers
It would help to know the make and model of your batteries! Manufacturers often have specific instructions for waking them up, so getting that info can guide the recovery process.
For a straightforward approach, any 24V power supply should suffice. The idea is to give it a slow charge until it reaches a normal voltage. You can find generic guides online for this process. Here's a helpful link: [Waking Up LiFePO4 Batteries](https://www.batteriesplus.com/blog/power/waking-up-a-lifepo4).
A couple of options: you could try using three 9V batteries in series to create around 27V to revive your batteries. Alternatively, if you have 12V car batteries, you can hook them up in series too. Just be careful with the connections; high current can create sparks! If you're looking to invest in a power supply, a basic variable one that goes up to 30V can be found for under $40 online.