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Specifications: 
Charging voltage: 4.2V
Overcharge protection voltage: 4.3V
Nominal voltage: 3.7V
Minimal capacity (0.5C): **0mAh at 0.5C discharge
Nominal capacity: **5mAh at 0.5C discharge
Charge current: 
    ï‚§    —    Standard charge at 0.5C
    ï‚§    —    Rapid charge at 1.0C
Standard charging method: 0.5C, CC (constant current) charge to 4.2V, then CV (constant voltage 4.2V) charge till charge current decline to ≤0.*5C
Charging time: standard charge needs 3.0 hours (ref) and rapid charge needs 2 hours (ref)
Maximum charge current: 1C
Maximum discharge current: 5C
Discharge cut-off voltage: 3.0V
Operating temperature: 
    ï‚§    —    charging at 0 to *5℃
    ï‚§    —    Discharging: **0 to *5℃
    ï‚§    —    Storage temperature: **0 to + *5℃
Cell weight: 5.3g (approximately)
Cell dimensions: 
    ï‚§    —    Diameter: 8.5mm
    ï‚§    —    Length:   *0.5mm
This kind of battery is specialized for electrical cigarette.