I have psion workabout pro3 its show backup battery very low how to charge

SOURCE: When should I replace my backup battery?

The back up battery should be replaced immediately upon seeing the message "Backup Battery Very Low - Your back up battery is very low or missing. Data loss may result from failure to replace the battery very soon. Consult the manufacturer's instructions for directions on replacing or charging the backup battery." Warning: It is important to note that the back up battery in the MobilePro 900 is not rechargeable, thus, to prevent data loss, it is important to change the back up battery immediately when this message is displayed.

SOURCE: Error message "Backup Battery Very Low"

The MobilePro 900 back up battery is low and should be replaced. The battery is a CR2032 coin-cell battery, which is very common and can be purchased at most department and drug stores. Refer to section 1-7 of the "MobilePro 900 Handheld PC's User's Guide" for detailed replacement instructions.

SOURCE: Hi guys, Need to cold

hold down blue red and left scan buttons for 10 secs, in boot menu press shift then 1

SOURCE: workabout pro wont turn on even with full charge

Make sure that the battery cover screws are in closed position. There is sensor that cuts power to device if battery latches are not completely closed.

SOURCE: HOW TO CHANGE OR CHARGE THE BACKUP BATTERY?

y hp6365 keeps telling me that i my backup battery is low..i keep charging my phone but the only the main battery is charging..how do i charge or change the backup battery?