Petsafe LITTLE DOG Remote Trainer Operating And Training Manual page 14

To Insert and Remove the Battery
Note: Do not install the battery while the Receiver Collar is on your pet.
This Receiver Collar utilizes a replaceable PetSafe
(RFA-188). This unique battery is designed to make battery
replacement easier and increase water protection.
To insert the battery, align the symbols on the battery
(indicator line) and Receiver Collar (triangle). Using the edge
of the Test Light Tool as shown, turn the battery clockwise
until the arrow lines up with the "On" position if you are
putting it on the dog or the "Off" position if it is not being
put on the dog right away (A, B) .
To remove the battery, turn the battery counter-clockwise using the edge of the Test Light
Tool as shown, (C, D).
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battery
1-800-732-2677
A B
D
C