Sony GV-D1000 Operating Instructions (primary manual) Operating Instructions Manual page 18

Step 1 Preparing the power supply
What is "InfoLITHIUM"?
The "InfoLITHIUM" is a lithium ion battery pack
which can exchange data, such as battery
consumption, with compatible electronic equipment.
This VCR is compatible with the "InfoLITHIUM"
battery pack (M series). Your VCR operates only
with the "InfoLITHIUM" battery pack. The
"InfoLITHIUM" battery pack M series has the
mark.
"InfoLITHIUM" is a trademark of Sony Corporation.
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