Efan(Eizfan) 18650 2500mah Li-ion battery, HKJ test here: Test/review of Eizfan IMR18650 2500mAh (Black-purple) 2018
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Capacity: 2500mAh
Nominal voltage: 3.70V
Standard charge: 1250mA, 4.20V, 50mA cut-off
Fast charge: 4000mA, 4.20V, 100mA cut-off
Maximum charge voltage: 4.20V
Maximum charge current: 4000mA
Standard discharge: 500mA
End voltage (cut-off): 2.5V
Discharge current: CDR 25A, Max 40A
Operating temperature: Charge: 0°C ~ 50°C, Discharge: –20°C ~ 75°C
Storage temperature: 1 month: -°C ~ 60°C, 3 months: –20°C ~ 45°C, 1 year: –20°C ~ 20°C
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