Chapter 5: Maintenance
20 HOBO Energy Logger Pro User’s Guide
Replacing batteries
Fresh batteries are cheap insurance for extended deployments or high-draw applications when using an external
power source is not feasible.
• Before replacing batteries, always read out the logger to prevent data loss.
• Replace batteries at least once a year to prevent loss of data.
• Replace batteries more often if you are using sensor excitation.
To replace batteries:
1. Select the type of batteries you will use and obtain eight fresh, new batteries of the same type. For more
information on selecting the type of batteries to use for your application, refer to “Selecting batteries” on
page 12.
2. Using a Phillips head screwdriver, loosen the screw on the back of the battery compartment door. Remove
the door.
3. Remove the used batteries and dispose of them properly.
4. Install eight new 1.5 V AA batteries, using care to match the polarity marked in the battery compartment.
Do not mix battery types.
5. Position the battery compartment door in place and tighten the screw to secure it. Do not over-tighten the
screw.
Loosen screw on battery
com
artment doo
Insert batteries into
battery compartment
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