Lithium battery not waking from low-voltage cutoff

A lithium (LiFePO4) battery that's dropped into low-voltage protection cutoff and won't 'wake up' even when you reconnect a charger is a common point of confusion — some BMS units require a specific wake-up sequence (like briefly connecting a load, not a charger) to reset out of protection mode. Check your specific battery's manual for its actual wake procedure since this varies by manufacturer and isn't always intuitive. What brand of lithium battery?