Brand RUSTU Color Black Material Non-woven fabrics + silicone Quantity 1 Type Lithium ion Model 18650 Mark Capacity 1250mAh Actual Capacity 4 x 1250mAh (total 2500mAh) Battery Voltage 8.4 V Rechargeable Yes Rechargeable Times 600 Buitl-in Protected Circuit Yes Over Voltage Protection Yes Short-circuit Protection Yes Over-charging Protection Yes Over-discharging Protection Yes Mercury Free Yes Application Universal bicycle headlamp Other Features Can put into water for 2m; 2S2P batteries; Charging time: 4~5h; Suitable for various T6 P7 R5 lamp; Can light for 3~3.5h for 3 x Cree-T6 and 4h for 1 x Cree-T6 / SSP-P7 Packing List 1 x Battery (45cm) 1 x Nylon pouch