Route,
Download and install acbpowermeter here:
http://acbpocketsoft.googlepages.com...rSetup-1.1.exe
then measure your usage levels and patterns. You probably also want to order a new battery.
Theoretically, draining a fully-charged OEM battery in 1 hour would require an AVERAGE current draw of 1350 mA, which is nearly twice the absolute PEAK current draw I've ever seen on my Apache. IMO, chances are >95% that you've got an old, tired battery that won't hold a charge.