I took it to work in construction, the main thing of course is when you sit on the scaffolding, ten meters away, and there are no Heaps of wires and loud mats. Batteries 5am / h on siding or panels are enough for about 1 hour of intensive work, but for metal, take 9am, because, people have already written, 5am is enough for literally 20-30 minutes through a 20x40 profile pipe, or have 2-3 cans of 5am . Buy it, it's a good tool.