FLYPOWER 12v 80Ah LifePo4 Battery Up to 7000 Deep Cycles with BMS Lithium Iron Phosphate Battery for Trolling Motor Solar Panels RV Bass Boats Golf Carts Off Grid Applications Household Appliances

80Ah rated battery arrived with full charge. Topped off with charger that was provided to 14.6V which only took 5 minutes. Used QWORK Battery Monitor to test capacity. Drained at very slow rate ~1.8 amps for ~40 hours straight. At 71 Ah used (9Ah remaining), the voltage dropped just below 12V at which point the voltage was dropping much faster. I let it drop to ~11.5V but figured I would stop there. I only got minimal addition capacity (~1AH) from 12v to 11.5V. I assume I would only get a few more Ah if I went all the way down to 10V, but happy with what I got since I plan to use a low voltage disconnect set at 12V in the future. Therefore with a pretty conservative low voltage protection, I still get 90% of battery rating (72AH of very usable capacity). I'm pleased with that.I have NOT tested any of the BMS protections. I'm particularly concerned with the charge protection below freezing. I'm hopeful this works as expected and prevents charge below freezing.

As you can see in the picture, no uniformity in construction... terminals are backwards and labeled incorrectly(that's not actually positive under the red terminal in the right) ... when confronted, I was offered $20... I should have bought a higher quality battery, got suckered by the low price...