It's great to be able to obtain a precious technical information for a real old equipment. The one I got helps me a lot in the area of wiring diagram to repair my antique. PDF gave me clear enough information to find out thr details. Thanks for giving me the oppotunity to be able to access to almost vanished informations.
Another excellent aquisition. Fine detailed manual. Thanks
Text excerpt from page 40 (click to view)
Connecting a Power Source
9
Using Battery Power
You can use a battery pack as a source of power. The PCGA-BP51A battery pack that comes with your computer is not fully charged at the time of purchase. Follow the steps below to insert and charge the battery pack.
You can also purchase the high-capacity PCGA-BP52/BP54 battery pack as a separate option.
To insert the battery pack
1
Make sure the Lock lever on the bottom of the computer is in the release position.
Lock lever
2
Align the grooves and tabs on the battery with the notches and tabs on the back of the computer. Slide the battery towards the computer until it clicks into place.