Lectrosonics M187 - Manual (Page 6)

BATTERY REPLACEMENT
The M187 transmitter is powered by a standard alkaline 9 Volt battery. It is important that you use ONLY an ALKA­
LINE battery for longest life. Standard zinc-carbon batteries marked “heavy-duty” or “long-lasting” are not ad­
equate. They will provide only about 4 hours of operation. Similarly, ni-cad rechargeable batteries only provide 4
hours of operation or less, and will also run down quite abruptly. Alkaline batteries provide about 15 hours of opera­
tion.
To open the battery compartment, press outward on the cover door in the direction of the arrow as shown in the
drawing. Only firm, sliding pressure is needed to open and close the battery door.
Press outward on the
battery door in this
direction Swing the
door open
Swing the door open and take note of the polarity marked inside showing the location of the positive (+) and negative (­
) terminals. Insert the battery correctly and close the cover by pressing the door closed and across, reversing the
opening procedure illustrated above. Don’t force the door closed. The terminals will hit a protective polarity barrier.
You can see the large and small contact holes inside the battery compartment.
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