I didn't know there was a Maha charger with variable charge rates, that sounds like a very good idea. I had a smart charger that monitered temperature & voltage.... it still ate batteries, they were fairly warm once charged :-(
If the Maha works for you thats cool. I suspect your charger cost a lot more than mine plus an extra set of batteries so if you are organised my system costs less and still works well. I quite like having the extra batteries as backups, YMMV