... consumptionPractical:Products adopt separation design, and elaboratly design unique invisible battery area. It is convenient to do outdoor sports in ... warmth and care in cold.Good warm effectHigh capacity rechargeable Li-polymer battery, Votage: 3.7V/7.4V, Capacity: 2200mAh/4400mAh, ... -10 hours, and maintain the temperature about 38-50cStylish : battery heated gloves,rechargable battery heating glove