Amazon.com: Beleeb Multi Voltage Battery Charger 12V 24V 36V 48V 60V 72V for Lead-Acid and Lithium-ion Battery,Trickle and Desulfator, 19lb, Black : Automotive
LTC4000 LiFePO4 battery charger circuit diagram
High Current Li-Ion Battery Charger Circuit | Homemade Circuit Projects