I also have a dynamite mega 1 charger that is the old school dial timer style. I need to figure out a way to use a multi meter to ensure that my batteries are charging to capacity, how do i go about doing that? i have a 2100 and 4500 mah battery.
Needs a lot of attention, but…. While charging, put a Voltage meter on the pack. The Voltage will rise as it charges. As it finishes charging the Voltage will level off then start to go down. This is the Delta Peak that a modern peak charger looks for. For a nimh battery stop when the pack has dropped by 3 to 5mV per cell or so. Or in practical terms just stop as soon as you see a drop. Also the battery should get warm, not too hot to hold, but noticeably warm, perhaps 120F or so. If they are older unused for a while batteries they may take some cycling to get whatever you can out of them.