Built in Battery
Built-in batteries are charged through an on-board USB port and allow your e-cig to be used while on charge.
The light on the battery will flash to indicate a proper connection to a powered USB cable and depending on the e-cigarette, will pulse or glow to indicate charging or the battery symbol on the screen will pulse.
Once charged, the colour on the button may change, or the battery symbol will flash showing full, once this happens the USB cable can be removed. Charging most batteries should take between 3 - 4 hours for a full charge (Depending on the battery size). It is advisable that you only charge your battery once it is completely depleted.
Remember, every e-cigarette is different, so please check the product manual to see the indications of charging your e-cig.