Aukey is currently running a pretty solid deal through Amazon on their 20,000mAh Quick Charge 2.0 power bank. With coupon code (AUK2MAHQ), this tank of a battery pack drops to just $27.99, plus it includes Prime shipping.
For output ports, you have a single 2.4A port and single Quick Charge 2.0 port, combined with input ports for microUSB and Lightning. The device also has a flashlight, for those times when your power is iffy.
At 20,000mAh, you could potentially charge your device five or six times before needing to re-charge the power bank. Devices like this are great for stashing in a coffee table drawer, keeping bedside, or on camping trips or other times where you might not be able to get to an outlet for extended periods of time.
Additionally, with both microUSB and Lightning ports for re-charging it, this is one of those power banks that is made for everyone. Nothin’ but love, homies.