HOWTO: Reset discharged battery for IPAQ 6515

Cause of issue:

Leaving the battery of the IPAQ 6510/5 to discharge completely (i.e not connecting the battery to the power mains for a few weeks.) and is unable to power up even after charging.

This may also fix other miscellaneous battery power problems.

Symptoms:

When the battery is finally plugged into the mains, the power led is red and the ipaq starts up but keeps rebooting. Leaving the ipaq connected to the mains overnight or trying hard/soft reset does not help.

Solution:

1) Connect the ipaq to the power mains and send the ipaq into bootloader mode by holding the joystick + power and poking reset button
2) Using romupdate.exe connect to the ipaq
3) Execute the following command for a software reset

USB> task 8

The IPAQ should reboot itself and the power led should turn orange meaning that the battery is charging. Leave it to charge until the led turns green which means that it has fully charged the battery.

Links

• HOWTO: Change serial number and model number for HP IPAQ 6515
• HP IPAQ 6515 Bootloader password
• HP IPAQ 6510 / 6515 dead GSM after failed Firmware upgrade
• Exploring HP IPAQ 6515e bootloader