I pulled my IPAQ 3635 out for an upcoming deployment overseas. It would run on the cradle but the battery would not even power the unit up. I went online and purchased an aftermarket battery, I called and the guy assured me it was an exact replacement for the factory battery. (The battery place is respectable). As soon as I plugged the new battery the unit powered up. After 3 hours of charging and removing it from the cradle it only shows 25% or so charged. The instrcutions stated 3 hours. Any idea what is keeping it from charging all the way? I will let it charge overnight to see what happens. Please heuuulp!