You don't need to disharge NiMh batteries regularly. I'm just trying to help you get "back in the ballpark".......find a baseline, if you will. I never discharge mine. I charge my 4200's at 3.0/30mv and balance them about every month at .42 amps. Some run their batts more, some less. This info is just a "rule of thumb". You can charge them at 100 amps if you want. Maybe you have a budget that allows you to replace your battery packs at will. I don't. I try to take care fo, and make my packs last like they should/can/will/etc..........whatever.