Question

what does a heavy - duty cordless drill have that is different from a typical cordless drill?
voltage rating
keyed chuck
variable speed adjustment
battery pack

Explanation:

A heavy - duty cordless drill typically has a higher voltage rating compared to a typical cordless drill. Higher voltage generally means more power, which is suitable for heavy - duty tasks. A keyed chuck is more about how the drill bit is held (a keyed chuck requires a key to tighten the bit, while a keyless chuck can be tightened by hand). Variable speed adjustment is a common feature in many cordless drills (both typical and heavy - duty) to control the drilling speed according to the material. The battery pack is a component of both, and while the capacity or type might differ, the voltage rating difference is more fundamental for differentiating heavy - duty from typical in terms of power capability.

Answer:

voltage rating