Sears offers the DieHard 50-amp Shelf Battery Charger and Engine Starter, model no. 71322, for $40.49. Opt for in-store pickup to dodge the $11.79 shipping fee. That's $35 off list and the lowest price we could find, although we saw it for $3 less in December. 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. Plus, Shop Your Way Max members are eligible for free shipping.