Hi, i have discovered a strange thing about charging the Garmin battery in my Oregon and Montana. This condition happens when you charge the unit in an off condition. When the battery is fully charged and you unplug the usb charge cord, it appears that the unit remains off as no screen appears. Apparently, it is not off and will discharge. I have learned to turn the unit on and then back off after unplugging the cord. This prevents battery discharge. I thought there was something wrong with my batteries, because they were not holding a charge.