Home Depot offers the Husky 4-Gauge 20-Foot Booster Cable, model no. 0160420-UL1, for $19.97. Opt for in-store pickup to dodge the $6.24 shipping fee. That's tied with our mention from two weeks ago, and $5 under the best shipped price we could find. It features vinyl-coated clamps and copper-clad aluminum wire.