AUKEY's 20,000mAh Quick Charge 3.0 Portable Charger is currently on sale over on Amazon. It is typically sold for about $42.99, which is a pretty decent price for what you're getting. But right now, the price can be dropped to as low as $30 when you use the promo code AUKBANK2 at checkout. Making it a fantastic deal.
This battery pack sports two full-sized USB ports, as well as a micro USB port for charging and a lightning port for charging as well. The USB-A ports work well for any device that you may have - whether it uses micro USB, USB-C or even Lightning. There's also a flash light in there that is a nice feature to have, especially if you are taking this camping or something. This does also support Quick Charge 3.0, which means you are able to charge your smartphone pretty quickly, without having to be tied to a wall outlet. Which is definitely a nice feature. Remember that Quick Charge 3.0 is also backwards compatible, so Quick Charge 2.0, Quick Charge 1.0 and even conventional charging works as well.
It's also eligible for Amazon Prime's free shipping. If you are not a member of Amazon Prime, you can sign up for a free 30-day trial and take advantage of unlimited two-day shipping as well as the many other perks that Amazon Prime includes.