Palmer PESM Solid Metal Manuel D'utilisation page 12

INSERTING/REpLACING A BATTERY
The Battery is of the 6LF22 blocktype (9Volts). A quick access com-
parement for easy battery replacement is located at the bottom of
the unit. Always remember to unplug your guitar cord from the Input
of the pedal to prolog battery life. Some battery drain may occur
when the unit is plugged in, even if it is bypassed.
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1
Lift up battery holder
2
Open flap
3
Insert battery (observe correct polarity)
4
Close battery holder
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