If sensor has been put outside for some time, and solar
panel has charged up the internal accumulator fully or
partially, if you install the 2 AA backup battery, the
system might not start up properly. So you can always
make a system reset by press the “Reset” button.
Figure 2: Battery installation diagram
Note: Please make sure the battery is inserted
correctly for its polarity as the system needs its
initial power from this backup battery to start
up the system before solar panel charges up the
accumulator and supply system power
afterwards. when in high altitude area, during
wintertime, sunshine time is short, thus system
needs to be powered from this backup battery,
we recommend Lithium batteries to be used for
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