I have a Nexto Ultra 2525 and 3 extra batteries. The problem I am having is it does not charge the batteries.
When connected to the AC and/or battery it works I can load/upload files, I turn it off, it writes bye! on the screen button shows red. But after 3-5 seconds it boots up again and stays on. The same happens when connected to PC and battery and turned off, it boots up again.
The batteries are only charged when the device off but it does not stay off and boots up again, so the batteries are not charged.