Spare lithium battery suitable for all 30seven heated gloves and insoles. Take along an extra battery pair when spending the whole day outside or in a cold environment you never know when extra heating may be needed! Battery Information: 3 heating levels Weight: 82.4 gram Size: 76x50x10 mm Battery life: power max: 2-3 hours, power min: up to 6 hours Recharging time: +/- 4-5 hours At least 1000 full charges Features: 3 heating levels Battery life: power max: 2-3 hours, power min: up to 6 hours Recharging time: +/- 4-5 hours At least 1000 full charges Spare lithium battery suitable for all 30seven heated gloves and insoles Care Instructions: Correct usage and storage of the battery will prolong the capacity and battery life. Charge the batteries on a regular basis (at least every 3 months) to prolong the battery life, even during summer when the batteries aren't regularly used. Use the specified charger only. Using another charger may affect the battery life and can affect your safety. Always disconnect the battery if the heated clothing is not used. Batteries that stay connected will still consume a small amount of power. (Re)charge the battery only shortly before actual use (e.g. overnight), as a battery still loses capacity even if it is not enabled. The battery does not need to be fully charged to function. However, frequent insufficient charging over a period of weeks does result in reduction of the performance capacity. Completely discharging the batteries insures extremely efficient utilization. If this does not occur regularly, the charging capability can be impaired. Do not expose the battery charger to moisture. Store the batteries in a dry environment at room temperature. A lithium battery cannot be overcharged via the charging control in the battery pack. It can easily withstand an overnight stay in the socket, although it only needs 3 hours to fully load. 30seven Rechargeable Battery for Gloves or Insoles