Oxa via Amazon offers the Tenker 500-amp 10,800mAh Portable Car Jump Starter for $48.99. Coupon code "GZ3ZX2TU" cuts that to $31.84. With free shipping, that's $17 off and the lowest price we could find. (Most third-party sellers on eBay charge around $65.) It features a USB Type-C port and 3-mode LED flashlight. Deal ends February 15.