Try resetting the battery meter . . .
Disable any background app before starting. This is critical! Chatter, Treoalarm, and quicknews were the three I had to turn off. SET them to off, because you will be resetting the device a couple of times in this process.
Please follow the steps below to solve the issue:
1. Connect your Treo to a wall charger.
2. Remove the battery from the Treo and wait for at least one minute.
3. Remove the SIM card from the device and wait for another minute.
4. Put the battery back into the device (without the SIM card) then let your Treo charge for at least 4 to 6 hours and for this duration:
- Do NOT press any key after reinserting the battery.
- Do NOT switch your TREO On or Off either, it will do so automatically after a short time.
- Do NOT enter the SIM card PIN if prompted to do so, just wait!
After this procedure, which can be performed and repeated any time, you will now dispose of the full charging capacity and the display of the remaining battery power will work correctly.”