Technical data: Brand: PATONA Designation: 18650 Li-Ion Capacity: 3350mAh Nominal voltage: 3.7V Charging end voltage: 4.2V ± 0.05V Discharging end voltage: 2.5V Max. Current output: 4875mA Max. Charging current: 1625mA Protection circuit PCB: not present Positive pole: sharp/button top Diameter: 18.29 ± 0.11mm Height: ? 65.15mm Weight: Max. 49.0g Operating temperature: Charging 0-45°C, discharging -20-50°C Rechargeable: Yes Charging cycles: 300 Charging method: CC-CV