15000mAh 500A D21 Peak Portable Car Jump Starter for $49.99AC + FS at Amazon
http://www.amazon.com/dp/B019VU617A
$30 off $79.99 with coupon SKD21521

Coupon code expires 05/31

Comes with this pretty lantern too:
http://www.amazon.com/dp/B0166Q0UWY/
Add both to cart, no additional coupon needed.