Here is an estimated battery life you can expect depending on the heat setting and apparel item:

Type: Fine Wire

2011 - 2013 Ducati 848 EVO

5 cm Weight 5 Kg Epoxy powder painted steel pipe Ø 35×2 cm

Length 175 mm

Wera Tools - Series 7400 Kraftform pistol handle, adjustable torque screwdrivers (25.0-55.0 in. lbs.) with Rapidaptor quick-release chuck Model:7447 25,0 - 55,0 in.lbs. Here is an estimated batteryWera torque screwdriver. Kraftform pistol handle for particularly high torque transfer, multi component for high working speeds and particularly ergonomic screwdriving. Variable torque setting option with highest precision. Simple adjustment of the required torque value without any special tools. Easy to read scale value. Rapidaptor quick release technology for rapid bit change. Unlimited torque to loosen seized screws. Multi component Kraftform