Hi Jeff, The charging contacts for the TH-F6A as you know are on the back of the battery. The maha charger will work with it fine. The charger features what they call floating pins that can be adjusted to handle different batteries. I have the maha charger and it works well. There is a rapid charge mode and it works well. The charger will even beep when rapid charging is complete. Dave Marthouse N2AAM [log in to unmask]