Sportcraft Heart Rate Monitor - Tra...

Since Sportcraft no longer replaces batteries in their heart rate monitors, I'll need to know how to do it myself. The receiver/watch has screws on the back, so this will be no problem. However, the transmitter that straps to the chest has no outwardly visible means of case separation. There is a front nameplate that may grant access, or two pyramid-ish shaped inlays on the back, one at each end near where the pick-ups are, although there is no place to insert a tool to pry them out to access any fasteners. The case halves are so tightly mated that I doubt simply prying them apart will work without damaging the unit. I don't have a strong, miniature vacuum device, so I was thinking about super-gluing a handle of sorts to the inlays on the back to pull them out, assuming that they are merely press-fit in. But, then, cleaning up the glue with acetone thereafter is sure to dissolve the plastic, rendering the unit non-watertight, as would any drilling. Sportcraft did suggest possibly taking it to a jeweler, so what I need to do can be done with the ''right'' tool(s), but I haven't a clue what it/they might be. Aside from chucking this one, and buying a new unit, has anyone any ideas? Thanks.