4manpop

I am NEW to the forum and I hope someone can help me?. I have an MZ RH10 MiniDisc Player which supposedly takes the battery MH 14WM. I have purchased this from Sony and online distributor but the batterys will not fit in the chamber of my Recorder? The batteries are too wide and thick! Can anyone help me with this? The MZ RH10 was made in Malaysia, if this is any help. Thanks for all comments, 4manpop