This series of battery cells are mainly suitable for various wireless portable electronic products or devices used in low temperature environment, such as cold storage wireless devices, 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 batteries, and the performance is more stable under normal temperature environment.
warnings: This product is a semi-finished product of the factory, without any protective measures, need to be processed and assembled before use, non-professionals please do not unauthorized processing and assembly.

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%