We post a lot of deals on large USB battery packs, but more often than not, all you really need is a little bit of extra juice to get through a long day away from power outlets.
This 3350mAh RAVPower Luster battery is small enough to fit into pretty much any jeans pocket, and packs enough power to fully recharge an iPhone 7, or to give a significant boost to a larger phone. Get it for just $7 today with promo code KJAPB335.