Aukey 20,000mAh Battery Pack With Lightning Input, $22 with code AUK2MAHL | Quick Charge 2.0 Version, $28 with code AUK2MAHQ

Aukey is fairly unique in offering USB battery packs that can recharge over a Lightning cable, and two different 20,000mAh options are on sale today. The more expensive of the two includes Quick Charge 2.0, which somewhat ironically isn’t available on iPhones.