Ego V V Battery (SMD-V V)

Ego v v battery is design at 2012, the battery has three different battery voltage
3.4V, 3.7V and 4.2V. When change to another voltage, the light will change as the different voltage.
Advantages
1. Vapor volume can be adjusted by oneself, it can meet different needs from different customers
2. You can know battery power state any time.
3. At the bottom of battery is a LED display screen to show remaining power, 5 lights grids are red in LED display screen when the battery is with adequate power. Grid will turn off to show some of power having been used out. By the same logic, when just one grid lefts show red, you need to make a preparation of recharging