I'm offering the pages here for information only, without warranty for purpose or responsibility for errors in use. You do need to read these pages thoroughly, and if you have questions, I suggest consulting with a photographer familiar with these older cameras. Never force anything.
The battery for the Sensomat RE is the obsolete 675 type; you can use the newer SR44 type, however, read carefully the page on batteries first. I haven't personally heard of a Miranda being affected by using the newer 1.5v types, but there is no warranty or responsibility accepted for readers trying to use these later batteries.