LFP/LiFePO battery asleep?

shelbyfv wrote:
It's a 12V 100Ah and it has discharged to 8.94V. It will not take a charge. I have tried the trailer onboard charger, connecting to another 12V and finally bought a dedicated Li charger with an "activation" feature. The last was suggested by the battery manufacturer. I don't know how it became so discharged. It was in the trailer and I'd pulled the fuse for the only known parasitic, the LP detector. It has a BT monitor feature that has also failed. Anyway, I'd appreciate any other suggestions for revival.

If under warranty I would utilize that feature.

If a fixed power supply such as an RV converter will not wake it up there may not be much that can be done externally. May have to open the case and charge the cells directly, bypassing the BMS. This is a tedious process and may need special equipment.