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3.3 Electrical Connection
Battery operation
Before operating the VD81M a suitable battery or rechargable accu must be
inserted.
Therefore, pull the battery cover on the back of the unit downwards, connect the
battery to the cable plug and close the cover again by pushing it upwards until it
snaps into position.
Battery types:
- 9V AlMn block battery type 6LR 61; lifetime max. 2500h
- 9V Lithium block battery; lifetime max. 5000h
- 9V NiCd rechargable accu 150mA; lifetime max. 500h
Operation with external mains adapter
Alternatively to battery operation the VD81 can be supplied by an external plug-
in mains adapter (12V).
When using an external mains adapter, there must not be a
battery connected inside the instrument. The arising charging
current may lead to destruction of the battery and damage your
health by leaking battery acid.
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