A tangled mess of cords on your desk is certainly an annoyance, but on a construction site it can be a genuine safety hazard. Limits in battery technology have meant that larger tools still need to get their power from an AC outlet, but Dewalt has finally found a way to make almost every tool cordless.
Source: Gizmodo – Dewalt’s New 60-Volt Batteries Can Even Power Huge Tabletop Saws