10 Copyright © 2011-2013 SM2M+ User Manual
1.5V alkaline batteries, 1.2V NiMH batteries or 3V-3.3V lithium
batteries. The recommended lithium batteries are model U10026
from Ultralife Batteries. These are non-rechargeable lithium
manganese batteries. Please contact Wildlife Acoustics support for
more information.
A board containing protection diodes in two configurations must
be configured for the appropriate cell voltage. As shipped the
SM2M+ is configured for 1.5 or 1.2V cells. In this configuration the
batteries are wired in parallel groups of 4 in series. To use 3V-
3.3V cells the board must be removed, rotated 180 degrees and
reinstalled. This configures the battery cells in parallel groups of 2.
There is a small white arrow on the main battery board that aligns
with the arrow on the diode board as shown in the 1.5V position
below.
Warning:
Installing D-cell batteries with a higher voltage
than 1.5V without properly configuring the diode board
shown below will damage the unit.
Batteries must be inserted in the proper groupings which are
labeled “A” through “H” on the battery board. For 1.5V and 1.2V
cells all four battery holders corresponding to a letter must be
populated. Letters “F” and “C” have two on the back and two on
the front. For 3V cells only two of each letter must be populated.
If not filling all available battery positions, it is best to populate
the letters closest to the bottom as that will help the SM2M+ float
vertically.
