Из инструкции eVic-VTC Mini http://www.joyetech.com/download/?mid=4590
Weak Battery Alert: In VT/VW mode, when the device installed with an atomizer is working and the voltage of battery is below 2.9V, the device shows: Weak Battery. Meanwhile, the output power will be reduced accordingly.
Low Power Alert: When the voltage of battery is below 3.3V, the device shows: Battery Low. If you continue to press the fire button, the device shows: Battery low lock, and cannot work. Please recharge the battery to reactivate.
