AEG PROTECT B. 750 Operating Instructions Manual page 51

3. Pull first the right battery out and then the left one.
4. Withdraw the new batteries from the transport
container and put into the right position. Fix both
blocks together and connect the electric connections
with the junction line of the extracted battery system.
5. Slide the new batteries into battery module carefully
into the shaft.
6. Mount the bracket for fixing the battery pack and
connect the system electrically ( red - red / black -
black).
7. Close and reinstall the previously removed front
panel.
The battery exchange is completed.
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