sfty Sense Manual page 18

Changing the batteries
The batteries should be changed once a year. Make it a habit to change the
batteries on December 1st. This is the month when most fires occur!If your
sfty Sense starts to beep one time every three hour, or if you receive messages
about a low battery in your sfty app, the batteries need to be replaced. Always
keep an extra set of batteries in your fridge. Remember to place the batteries in
the right direction, look for the +/- sign in the battery compartment.
NB! Only use 4 Lithium Energizer AA batteries L91-FR6.
Note: Non-rechargeable batteries, do NOT try to recharge.
WARNING
Risk of explosion if the battery is not replaced correctly. Replace
only with the same or a similar type as mentioned above. Dispose
of used batteries according to manufacturer's instructions.
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