Tony:
I have one of the old MHC77 chargers, and have never had any real problems
with using it. My only problem has been that it has been hard to line up
the pins when trying to charge one of the battery packs for the old Radio
Shack HTX202 or 404, but that is more a problem with that kind of battery
pack than anything else.
I know that some of the guys on the list have the newer Maha charger models,
so they may be of more help than I. I think, though, that the newer models
are even easier to use.
Hope this helps a little.
Best 73 from Tom Behler: KB8TYJ