Charging Battery Packs - HP Armada 7300 Reference Manual

Charging Battery Packs

You can charge the battery pack in the battery bay by connecting
the computer to an external power source. When the battery pack
begins charging, the battery light on the front of the computer
turns on. When the battery pack completes its charge, the battery
light turns off.
A battery pack begins charging if the remaining charge is
NOTE:
approximately 93 percent or less.
The battery pack in the computer will charge when the computer
is off or when it is on and in use. A fully discharged battery pack
fully charges in approximately 1.5 hours if the computer is off,
and approximately 3 hours if the computer is on and in use.
You can also charge battery packs in the optional Battery
NOTE:
Charger, ArmadaStation, or Armada MiniStation EX.
Battery Light on Computer
5-4 Using Battery Packs