Franklin Collins DMQ-1490 User Manual page 11

Wrong polarity may damage the
unit.
6. Replace the battery cover and
secure it with the screw.
Warning: If the batteries wear-out
completely or if you take more than a
few seconds while changing the
batteries, any information that was
entered in the built-in books may be
erased. You should always keep
written copies of your important
information.
Battery disposal: Do not dispose of
batteries with normal household
waste. Please obey your local
regulations when disposing of used
batteries.
Battery Precautions
• Different types of batteries or new
and used batteries should not be
mixed.