Want something a little more portable? Amazon has the RAVPower 5600mAh External Portable Power Bank with Built-In Flashlight for $25.99. Coupon Code: AJTGLBHX at checkout drops it all the way down to $15.99 with free Prime Shipping (or it combines perfectly with the above to hit $35 free shipping w/o Prime). This has a 4 LED status indicator but one only has one DC 5V / 1A USB output so it will charge anything but iPads and larger items will charge slower.
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