This series of products are mainly applicable to various wireless portable electronic products or equipment used in low temperature environment, such as wireless equipment for cold storage, outdoor snow/extreme cold area adventure equipment, car recorder, GPS, tire pressure monitor, portable refrigeration instrument, outdoor work instrument, solar street lamp/lawn lamp, emergency power supply, etc.
Most of the batteries in this series are compatible with the corresponding models of ordinary digital type batteries, and the performance is more stable in room temperature environment.

Electrical Characteristics: 
Charging current: standard ~0.1C/fast ~0.2C
Charging time: 0.1C*15hrs(standard)/0.2C*7.5hrs(fast)
Standard charging method: 0.1C constant current (CC) charging to 4.2V, and then 4.2V constant voltage (CV) charging to current less than 0.01C.
Discharge cut-off voltage: 2.75V
Minimum storage voltage: 3.7V, otherwise it should be recharged in time

temperature characteristic::
Charging: 10~45°C Discharging: ultra-low temperature:-40~55℃; low temperature:-20~55°C    Storage: 0~25℃(-20°C for 4 hours)
Relative humidity: 45~85%