Arthur_itis -

There are solvents that will "degrade" even super glue enough that most things can be disassembled, but unfortunately the more effective ones are likely to dissolve anything else nearby. Superglue does degrade in common alcohol (e.g. rubbing alcohol), but it may need to soak for a rather long time to see an effect, and for a thin glue layer it can take a long time for it to penetrate enough of the joint to do much good.

The usual method of disassembly (for cyanoacrylates) is to heat the joint to around 400F for a couple of hours, which usually weakens the joint enough to be broken loose, but you probably don't want to put your GPS in the oven. For some kinds of parts a soldering iron might heat the joint enough without damaging adjacent parts, but that's not recommended for batteries since they have a tendency to explode - or burst into flames.

Most adhesives (yours might be something other than superglue) are strongest when you try to pull parts away from each other, but may yield a little easier if you can "shear" the joint as if you want to slide one part across the surface it's glued to, parallel to the bond line. "Twisting" the battery loose might be more successful than trying to pry it straight off, if you can get a grip on it to move it that way. (And of course that doesn't work at all with velcro.)

If a glue line is thick enough, the conservative approach would be to find a "knife" or "saw" thin enough to cut the glue out from between the parts, but if it is superglue that's not likely to be the case since the stuff doesn't set up unless it's in a joint thin enough to exclude air (oxygen).

These are pretty generic comments, since I don't really know what the whole situation looks like. It's unlikely that additional explanation would help a lot, since stuff that the mfr glues together usually just aren't meant to be replaceable. If it's not obvious that there's an easy way, the mfr is the best one to ask what's recommended.

John