Compaq Armada 7400 Reference Manual page 11

4. Remove the label from the battery pack
5. Reinsert the battery pack into the battery bay until it clicks
into place
The battery pack begins to charge as soon as the computer is
connected to external power.
Although a new battery pack can be used to power the computer
after receiving a partial charge, Compaq recommends that a new
battery pack be allowed to fully charge before the computer is
disconnected from external power or before the battery pack is
removed from the computer.
The battery charge level lights on a new battery pack
accurately display the percent of a full charge remaining in the
battery pack only after the battery has been fully charged.
A new battery pack fully charges in approximately
2.5 hours when the computer is connected to external power
and not being used.
4 hours when the computer is connected to external power and
being used.
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