JX-1 Portable 8.4V 4400mAh Rechargeable 4-18650 Li-ion Battery Pack + Charger - Black
Charge input: 5V 1A Charge Current: 700mA 8.4V; Charging condition: Red indicator flashes when it is in charge (Low power); Blue indicator flashes (Mid power); Green indicator flashes (High power); Green constant light ( Full charge); USB Condition: Out put in 5V 2A; Green light (Full power); Blue light (Mid power); Red light (Low power); Red flashes (Power nearly run out); Features: Can be used to charge bike light or electronic products with 8.4v power.