Aibo’s battery bay is very tight. When your Aibo battery gets older or has been re-fillt, it can be happen that the battery release don’t work properly and the battery remains stuck.
In this case you will need a little help to remove the battery.
Pull the release switch and help with a fine screwdriver to lift out the battery. It has to come out easy without force. It should be no problem to reinsert the battery and you will hear the clicking sound when the battery is in place…