Sunvalleytek via Amazon offers the RavPower 18,000mAh 600-amp Car Jump Starter Portable Battery Pack for $69.99. Coupon code "DEALCA53" cuts that to $51.99. With free shipping, that's $13 below our January mention and the lowest price we've seen. (It's the best deal now by $13.) It features a 12-volt power socket, two iSmart USB ports, two USB cables, jumper cables, and an LED flashlight.