7.4V 3000MAH Spare Rechargeable Battery For Heated Gloves Socks (2) Pack Features & details package List: A pair of 7.4V 3000MAH Ternary Batteries. 3000MAH Batterys Takes 5 Hours to Fully Charge.(Please fully charge the battery before the first use and then continue charging for 30 minutes) Charging Port Type: Female DC jack (3.5mm outer diameter, 1.35mm inner diameter). Charger Parameters: Input : 100-260V-50/60Hz 0.5A (max),Output : 8.4V, 1.5A. Global Safety Certificate: UL(Underwriters Laboratories Inc.) and FCC(Federal Communications Commission). Batteries Using Life: 500-600 cycles of charging. Please charge every Three months during storage, Store in a dry indoor environment. Red light is on when charging, green light is on when fully charged. Product Use: Rechargeable 7.4V 3000mAh lithium polymer battery for DC jack heated gloves, socks, jackets.