Please i need an urgent solution to my blackberry 9700 (bold 2), most times when i off it for like an hour or so, by the time i switch it on back, my battery would have drained to zero percent most times shutting down, this has being happening to me since even is my battery is fully charged.

When i want to sleep at night, i have to remove the battery to prevent it from being drained, as electricity is very poor in my area. Please, what can be done to prevent this.

honest Idea. buy a new phone.