Nitecore 18650 2600mAh USB Rechargeable Li-ion Battery NL1826R Features: Micro-usb rechargeable Capacity: 2600mAh Voltage: 3.6V Output: 500mA Weight: 47.3g Dimension: Length 70mm, Diameter 18.6mm Package Includes: 1 x Nitecore 18650 2600mAh USB Rechargeable Li-ion Battery NL1826R Warranty : 1 year 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.