Mine is a Swiffer Wetjet. Funny story...I have had it a long time and never had to replace batteries. I didn't even realize that it HAD batteries!! When it stopped working, I just thought it was broken and had DH buy a new one. Then for some strange reason, I decided to look at it and realized it had batteries LOL. Boy I wasn't feeling too bright then!! Luckily I never opened the new one! (The battery compartment is below the cleaning solution bottle).