Rear view of the recorder.

There were 2 types of 'intelligent' NiCad battery packs that lock into the rectangular
recess at the back of the machine - just under the deck plate. They are securely held
in place by a simple peg on Left side and a spring-loaded plunger on the Right (this
can just be seen in this image).

The Kevlar clad (yes, what they make bullet-proof vests from) 44 minute battery as
is shown here did not project beyond the rear face of the machine, but the alloy
cased 4Ah battery type NV-2ACC was a rather deeper and very much heavier unit.

(Click on the above picture to see the various VPR-5 battery packs.)

(When the scanner is powered down, its high rotational inertia allows it to act as a
generator to feed power back into the batteries.)

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VPR-5 Battery.