Gooloo via Amazon offers Prime members its Gooloo Compact 12,000mAh Car Jump Starter, model no. GPower120, for $59.99. Coupon code "35OPPGUV" cuts that to $39.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.75.) That's $100 off list and the lowest total price we could find, although we saw it for a buck less in July. The device will jump start gasoline or diesel engines and includes an LED flashlight and dual USB outputs.