We have flown a lot with this setup. Gone weeks without recharging. We're using the same stock charger and those same cells in the SD-5G in little park flyer Cessna 310B we pass around at our club. The TX almost NEVER gets charged the day before we fly. (No one really ever remembers to do it.) It's always fine. Unlike the days of 72, 2.4GHz radios sip power in comparison (unless they have a giganto color back lit screen the size of Miami...).