Looking for a great battery in a smaller size? The E-smart 510 manual battery from KangerTech may be the perfect one for you. It is a great match for the ESmart clearomizer. It is a 320 mAh battery. Diameter 11mm, Height 75mm

The E-smart 510 manual battery has following features:
1. Battery cut-off. The button LED will flash 5 times to stops outputting voltage when the button is pressed for more than 15 seconds.
2. Safety function. The battery has a power saving/safety function which allows users to turn on and off the battery. It prevents accidental discharge of battery when not in use. Press the button 5 times to turn on/off the battery, the LED will flashes 3 times.
3. LED indicator. When the battery power is low, the button LED flashes 15 times when pressing to indicate the battery needs charging.
4. Constant Voltage. The battery offers a constant voltage 3.7V, so you can enjoy consistent vapor.

Users should use only the dedicated Kangertech USB charger for the E-smart battery. Fully charge battery before using. These tips will help prolong the lifespan of the battery.