Sears offers the DieHard 50-amp Shelf Battery Charger and Engine Starter, model no. 71322, for $39.99. Opt for in-store pickup to dodge the $11.79 shipping fee. That's $35 off list and tied with our February mention as the lowest price we could find. It features 50-amp clamps, a power meter, and battery charger control switches.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.