INR21700-M50LT product specifications:
Energy:
Nom. 18.2 Wh
Min. 17.6 Wh
Nominal Voltage: 3.69V
Standard charge:
Constant current (1C=4800mA): 0.3C (1,440mA)
Constant voltage: 4.20V
End condition(Cut off): 50mA
Charging time: 4h
Max. Charge Voltage: 4.20V
Max. Charge Current:
0 ~ 25ºC (Atmosphere): 0.3C (1,440mA)
25 ~ 45ºC (Atmosphere):0.7C (3,360mA)
Standard Discharge:
Constant current: 0.2C (960mA)
End voltage(Cut off): 2.50V
Min. Discharge Voltage: 2.50V
Max. Discharge Current:
-20 ~ 10ºC: 0.5C (2,400mA)
10 ~ 25ºC: 3.0C (14,400mA)
25 ~ 55ºC: 1.5C (7,200mA)
End of charge voltage: 4.25V
End of discharge voltage: 2.00V
Operating Temperature:
Charge: 0 ~ 45ºC
Discharge: -20 ~ 55ºC
Storage Temperature (for shipping state):
1 month: -20 ~ 55ºC
3 month: -20 ~ 45ºC
1 year: -20 ~ 25ºC
Storage Temperature (for full charged state)
1 month: -20~ 45 ºC
6 month: -20~ 25 ºC
Storage Humidity: Under 60%
Weight: 68.2 ± 1.0g
Dimensions:
Diameter : ≤ 21.44 mm
Height : ≤ 70.60 mm

Warnings:
Do not connect battery directly to cigarette/aux jack in automobiles. Use only approved chargers.
Do not charge with constant current more than maximum charge current.
Do not charge the cell, which was discharged equal to 1V or under.
Do not disassemble or reconstruct the battery.
Do not throw or cause impact.
Do not pierce a hole in the battery with sharp things. (such as nail, knife, pencil, drill)
Do not use with other batteries or cells.
Do not solder on battery directly.
Do not press the battery with overload in manufacturing process, especially ultrasonic welding.
Do not use old and new cells together for packing.
Do not expose the battery to high heat. (such as fire)
Do not put the battery into a microwave or high pressure container.
Do not use the battery reversed.
Do not connect positive(+) and negative(-) with conductive materials (such as metal, wire)
Do not allow the battery to be immerged in or wetted with water or sea-water.
Do not give immoderate heat and force to battery cell during a welding process of metal plates on it.