Vax TBT3V1T1 Manual page 10

Getting started
Charging the battery
When the charger is connected, both the battery charging light on the back of the handheld and battery indicator
light on the handle will illuminate:
Red light - the slim vac is charging
The battery level gauge lights will illuminate in turn as the battery charges, until all four lights are illuminated.
Once fully charged, the gauge lights will go out and the central light will illuminate white.
If charging for the first time the initial charge time is 4 hours.
When the slim vac is in use the battery level gauge lights
will illuminate indicating how much charge is remaining.
When only one light remains illuminated the central
charging light and battery level indicator will turn red
indicating the battery is running low (<25%).
White light - the slim vac is charged