... Li-ion battery Aluminum Alloy Battery operated hand warmers with portable charger Feature*Power bank,compatible with Tablet PC,smart phone,MP3,MP4 ... 50m far away in dark night*Dual side heating Battery operated hand warmers,warm your hand,stomach,knee,neck.The heating ... It is healthcare product for your friends.Technical parameterPower bank with LED torch and hand warmerCapacity:5200mAh Cell type:Li-ion ...