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. Should you have any inquiries, be sure to reach out to us at the Amazon, and we will promptly address your issue. Rechargeable 7.4V 2500mAh/3000mAh Li-ion Batteries