Power supply compatibility：The 8.4V dual charging male DC jack connector for 7.4V 2200mAh, 3000mAh, 3500mAh rechargeable lithium polymer batteries. heated mittens、chargers hat、battery heated socks、heat gloves、liner mittens, socks, vests, jackets, hand scarves, and Li-Po by Working Condition: 7.4v battery charger voltage is 8.4 volts, plug in the charger and connect the battery, red light is on when charging, green light is on when charging is complete. Power supply specifications：power adapter Input Voltage AC100-240V;，50-60Hz，Output Voltage DC 8.4V Output Current 1000mA Output Cable Length 40inch Warm tips: Please charge the battery regularly to prevent damage caused by over-discharge; when charging, avoid placing the charger on flammable items such as sofas, blankets and beds Professional customer support :Before purchasing, please make sure that the power recliner power cord replacement used for your control box is the same as ours. Your satisfaction is our top priority, please feel free to contact us for any product support.