... Temperature-20°C to 45°C (within 1month)-20°C to 40°C(within 3month)-20°C to 35°C(within 6month) 2.Advantages of Li-ion battery ... earphone, digital photo frame, learning machine, portable DVD, mobile phone, cordless phone, portable television, airplane models, toys, power tools,etc. Shenzhen ... , welcome for long-term cooperation! rechargeable 903759 3.7V 2200mAh Li-ion polymer battery pack