Jackery Pop Slim, $15 with code JQPTX8IO

This pocket-sized USB battery pack from Jackery won’t win any price-per-mAh awards, but it basically the thinnest battery pack we’ve ever seen.

The $15 Jackery Pop Slim is barely thicker than your smartphone, despite packing in enough juice to give any phone a full charge. Just be sure to note the promo code below.