With a walk-behind Heavy-Duty Powered Wheelbarrow, one can reportedly transport a load of bulk materials weighing from 650 up to 1,200 pounds (depending on make/model). Some are powered by a gasoline engine, others by a high-watt/high-volt rechargeable-battery motor. All being four-wheeled, some have two large forward drive wheels with smaller stabilizing rear caster wheels, while others have equal-size drive wheels. A heavy-duty barrow can reportedly traverse rough terrain and climb steep slopes, with the operator merely guiding it via controls mounted on the handles. All come with multiple-speed forward and single-speed reverse gears, regenerative braking, and power-dumping ability.