It also required a heavy battery and cable arrangement to power the scope.

Their heavy battery tanks were mounted beneath this deck, for stability.

Electric and hybrid vehicles, which carry heavy batteries, will be exempt or taxed less.

The powerful underwater lights that cave divers use are connected by wires to heavy battery canisters, normally worn on the cave diver's waist, or sometimes attached to their tanks.

It's a bold claim for an electric vehicle weighed down by heavy batteries, but that's not the half of it.