JETBeam brand 18650 li-ion batteries
Voltage: 3.7V
mAH: 2300
Built-in IC Protection
High Performance
Positive nub for better contact
Will work in all Jetbeam models that take 18650 type batteries.
**Packaged individually
***DO NOT USE Li-Ion batteries if you don't know the dangers about them and how to handle them. Please check out this resourceful website on handling, charging, and storage of Li-Ion batteries. Never leave charging batteries unattended. Do not charge more than 3 hours. Use at your own risk.
http://www.batteryuniversity.com/partone-12.htm