The Hercules is the best overall battery screwdriver in this comparison. It posted the highest breakaway torque at 109 in-lbs, tied the Milwaukee for working torque at 64 in-lbs while using half the battery capacity, drove drywall screws in half a second, and spun up to 1,259 RPM — the fastest in the group. Its trade-offs are bulk and noise: at 997 grams it is the heaviest model, and at 78.8 decibels the loudest. The Milwaukee is a very close second on performance, and at $49 tool-only it is a tremendous value for anyone already invested in the M12 battery system, with 105 in-lbs of breakaway torque, 1.1-second screw drives, and the best-in-class clutch.
For value, the $36 Vastar is the standout in the mid-range: 60 in-lbs of breakaway torque, 335 RPM, and 1.19-second screw drives that beat everything except the two 12-volt models. Among budget picks, the $25 Skil is the choice for light-duty work — smaller than most screwdrivers in its price range at 5.5 inches, yet stronger, with 29 in-lbs of working torque and 37 in-lbs of breakaway torque. The $40 NoCry also earns a look, finishing third in working torque at 42 in-lbs.
A few cautions: the $100 Ryobi was the only model to fail the 5-minute durability test, and it finished last in working torque at 12 in-lbs — hard to justify at that price. The $188 Makita delivers solid torque and a clutch that protects delicate fasteners, but it averaged a slow 3.3 seconds per screw, its two-position handle does not lock and can pinch the hand, and its direction controls sit awkwardly on the body rather than the handle. For work on delicate fasteners, stick with the Milwaukee, Metabo HPT, DeWalt, or Makita — the only models whose clutches disengage below measurable torque.