Nitecore IMR 14500 3.7V 650mAh Li-ion Rechargeable Battery NL14500A Features: High Discharge / IMR Cell Typical Capacity: 650mAh Nominal Voltage: 3.7V Discharge Voltage: 2.8V Charging Voltage: 4.20+-0.05V Max Continous Discharging Current: 6.5A Warning: This high-discharge performance Lithium-ion IMR battery is NOT protected against being over-charged, over-discharged or short-circuited. It is very important to observe the following when using: DO NOT discharge at below 2.75V DO NOT Charge at above 4.2V DO NOT short circuit (may release potentially harzadous current) Package Includes: 1 x Nitecore IMR 14500 3.7V 650mAh Li-ion Rechargeable Battery (NL14500A) Warranty : 60 days warranty from the date of purchase. Overdischarging or battery leakage is not covered nor is fast draining of battery while using. Please keep the voltage of all Li-Ion batteries above 3.8V for healthy storage. Recharge as soon as possible when you have run them down. Storing a depleted ( less than 3.2V open voltage ) battery may damage/ shorten life/cycle permanently.