I have a Samsung Charge, and was able to disable the annoying "Battery Full" notification by using Tasker. As others have stated, the Tasker solution I used is not specific to disabling only the BatteryFull notification when reached, but it does limit the amount of time notifications are disabled and when. What I did with Tasker:
- Contexts-Power, Time between 11p-6a, Battery between 99-100% ...Task - disable notification
- Contexts - Power, Time between 11p-6a, Battery Full ... Task - enable notification.
This should limit the amount of time notifications are disabled to only a few minutes, since it only takes that long to charge the battery from 99 to 100%.
