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18650 Rechargeable Li ion Batteries with PCB 18650 3000mAh PCB protected rechargeable lithium ion batteries are ideal for use in flashlights and other devices. Features: Integrated PCB protection (Helps prevent Anti-Overcharge, Anti-Overdischarge, Anti-Short Circuit) Manufactured under ISO9001-2000 to assure quality Battery Specifications: Capacity: Nominal: 3000mAh, Minimum: 2200 mAh Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V Nominal Voltage: Average 3.7V Cut-off Voltage: 2.5V Cycle Performance: 90% of initial capacity at 400 cycles Cycle life: > 500 cycles Charge: Current = 0.5C (~1500mA) Voltage = 4.2 V End Current = 0.01 mA Discharge: Current = 0.5C (~1500mA) End Voltage = 3.0V Battery Length: 69mm (2.72 inches)