When you see a Warning 80 or Warning 17 on a HandKey or a
HandPunch, it may mean that the lithium battery is low. The
first step is to try a warm boot on the reader to see if that help. If not
then try a cold boot but it will remove users data. If they both fail then you
may need to replace the lithium battery. A replacement battery can be
purchased at any electronics store. If after replacing the battery, the
Warning 80 does not clear, please contact Technical Product Support. Please
note you should never remove the lithium battery while powered up as it can
damage the main board.
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