Why do you recharge at nights so much, what I do is at home and at work the BB is always connected via USB to the computer, It keeps my unit at 100% all the time, I too have a 7250. I never charge with the wall charger, I use it a lot on the weekends away from the computer and the charge holds all day. When i get home at night to the USB connector for an hour or so and I am good. I have never had issues with rebooting or with the wireless turning off.
BB Tour 9650
Running OS 184.108.40.2064