I use them on my MXT and DFX. Max charge is 11.3 volts on mine. Has a real slow drop off during use. I just charge mine the night before each use. Never had to switch the battery out all day long. Only ran disposables in my DFX oncesince i had it. Quick charge is awesome if you forget during the night. Don't let the quick charge go longer than an hour. If you forget it is on quick charge it will destroy your battery.