Battery size please

[learninmypc]

When the batteries died on this https://mans.io/files/viewer/74440/1 I simply used a corded mouse & KB till I could get batteries for the mouse & KB. Yes, its an Acer Aspire Z3-600 & no where to my knowledge in that manual does it say anything about mouse battery size. I bought both aa & aaa but neither fot the mouse, kb works fine.The manual says nothing about kb battery size either but...........

 

[learninmypc]

Upon closer examination of mouse using brite light & magnifying glass, it appears there could be a piece missing from inside, back to corded mouse. Mouse on a leash lol