High Capacity Dual USB Portable Charger 15000mAh - External Battery Power Bank - by Viivant

I first used this power bank to charge my Samsung Galaxy Tab 4 7 inch tablet. When I plugged it in it was at less than 50%  and it took around 30 minutes to get it back to 100%. Other than it's large size I would give it 4 1/2 stars, considering it's size I think that this power bank would be best carried with one in their backpack, not so much in your pocket or purse. It was quite nice that it came with a 2 year warranty and a carrying pouch.

http://www.amazon.com/High-Capacity-Portable-Charger-15000mAh/dp/B00V2LUDI0/ref=sr_1_1?ie=UTF8&qid=1431904064&sr=8-1&keywords=B00V2LUDI0