Guessing LG. Do you have a link for specifics?
Nominal Specification
Item Condition / Note Specification
Capacity Std. charge / discharge 2500mAh
Nominal Voltage Average of Std. Discharge 3.60V
Standard Charge Constant current 1250mA
Constant voltage 4.20V
End current(Cut off) 50mA
Fast Charge Constant current 4000mA
Constant voltage 4.20V
End current(Cut off) 100mA
Max. Charge Voltage 4.20V
Max. Charge Current 4000mA
Standard Discharge Constant current 500mA
End voltage(Cut off) 2.5V
Fast Discharge Constant current 10000mA, 20000mA
End voltage(Cut off) 2.5V
Max. Discharge Current For continuous discharge 20000mA
Weight Approx. Max. 47.0G
Operating Temperature Charge 0 ~ 50°C
Discharge -20~ 75°C
Storage Temperature 1 month -20 ~ 60°C
3 months -20 ~45°C
1 year -20 ~ 20°C
Dimension (D)18.3 + 0.2/-0.3 mm
(H) 65.0 ± 0.2 mm