So, does it run on the battery at all, i.e. with or without the charger? I suspect that if it isn't running very long with either, it could be an over heating issue. Have you noticed it getting quite hot of late?
I use it with batteries if it is fully charge and I also use it with the charger if its already running on low batt.
Funny you ask because I noticed that it gets quite hot when I use it for long period of time.
Any tips? BTW Im not using it now because im afraid that it will cause more harm if I use it again.