Mckee Portable Mobile EV Charger with 3072Wh LiFePO4 Battery The Mckee Portable Mobile EV Charger is built around a long-cycle 3072Wh LiFePO4 energy storage battery. Using 32140 cylindrical cells in a 16S4P configuration, it retains 75% of capacity after 2000 cycles, and BMS software plus hardware dual protection safeguards the pack through every charge and discharge. Intelligent thermal management keeps the unit stable: the cooling fan starts at 45°C, the heatsink triggers