Blackzebra via Amazon offers the Vehemo 400-amp Car Jump Starter, model no. CCR-CB01, for $57.99. Coupon code "AVJ9ZMGD" cuts that to $29.99. With free shipping, that's $28 off list and the lowest total price we could find. It also functions as a flashlight, 11,000mAh USB charger, escape hammer, and air compressor.