As mentioned, the Folio features a powerful, rechargeable battery that lasts up to two years between charges. To check your Folio’s remaining battery power, simply press Fn + the battery key. The LED indicator will flash one of three ways.
1. Three green flashes indicate 50% or more battery life remaining.
2. Three yellow flashes indicate between 25%-49% battery life remaining.
3. Three red flashes indicate less than 25% battery life remaining. When your Folio reaches critical battery level, the red light will flash once every five minutes. To help preserve battery life, your Folio will enter sleep mode if left on and not used for several minutes. To awaken your Folio, press any key. The Folio’s battery has no memory and may be charged whenever you wish. For optimal battery life turn your Folio off when not in use for a prolonged time.