WARNING: This information is provided "as is" with no warranty. Use at your own risk!
This site is NOT affiliated with PB.

PB 301 Battery Upgrade

Warning Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system herself/himself should know about the dangers of ESD (Electro-Static Discharge) and the necessary precautions. Unknowingly zapping the components of the computer will void the warranty.
 
The system can use a 3.6 volt lithium battery. To install the external battery, remove the jumper cap on Jbts. Connect the battery to connector Jbt. The positive terminal of the battery connects to pin 1, the negative to pin 4.