Sennheiser SKM 1072-U Notice D'emploi page 15

Inserting the battery
Insert the battery as shown in the above figure.
Pay attention to the polarity !
Use only alkaline-manganese batteries or the approved accupack!
Otherwise operating time (see technical data) will be drastically reduced.
For frequent operation it is advisable to use the BA 1032 rechargeable accupack
instead of batteries.
BA 1032 accupack, charge in the L 1032 charging Unit
The BA 1032 accupack is charged in the L 1032 charging unit. The charger
requires the NT 1032 plug-in mains unit. One accupack can be charged in the
microphone, a second spare accupack can be charged at the same time in the
appropriate battery compartment of the charger. L 1032 and NT 1032 are available
as accessories.
The SKM 1072-U is connected to the L 1032 charger via charging contacts
figure on next page).
Please take care that these contacts are clean.
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