HP EliteBook 2540p Notebook PC - Manual (Page 72)

Identifying low battery levels
When a battery that is the sole power source for the computer reaches a low battery level, the battery
light blinks.
If a low battery level is not resolved, the computer enters a critical battery level, and the battery light
blinks rapidly.
The computer takes the following actions for a critical battery level:
● If Hibernation is enabled and the computer is on or in the Sleep state, the computer initiates
Hibernation.
● If Hibernation is disabled and the computer is on or in the Sleep state, the computer remains briefly
in the Sleep state, and then shuts down and loses any unsaved information.
60 Chapter 5 Power management