• Parameters of battery：Lithium Ion battery; Voltage: .7.4V; Capacity: 4000mAh; Type: Li-ion, Color: Black; Runtime: ≥60 minutes per charge
• Heated Gloves Replacement Battery: Suitable perfectly for heating gloves, socks, hats, jackets, clothes, back braces, shoes, insoles, knee pads Suits etc. for Most Winter Garments 7.4V Battery.
• How to charge the battery best: To maintain optimal performance, charge the battery of your device at least once every three months if it won't be used for an extended period. It is recommended to use the matching (8.4V output voltage) charger to charge the battery
• Upgraded Li-ion rechargeable battery the same size and thickness as your original battery. Our battery is manufactured with premium grade A battery cells, high quality Aluminum Casing and high quality Smart IC chip.It is tested under strict QC standards step
• Customer Service: Rest assured with 30 days Refund and 12 months Warranty; you can click on seller store on right corner “ask a question” and contact seller directly