USB LCD Battery Charger for 3.7V-4.2V Lithium Battery NI-MH AA/AAA 1/2/4 Slots
JK Smart BMS 8S-20S 200A B2A20S20P LiFePo4 Li ion Akku 2A Active Balance AEU DE. Four slots: 4.2V-4000mA (lithium-ion battery) 1.2V-2000mA (AA/AAA). Single slot: 4.2V-1000mA (lithium-ion battery): 1.2V-500mA (AA/AAA).