I'm sure you've come across this situation before - you're out, phone is dying on 3% and you can't find an outlet.
A lot of people have bought Mophie juicepacks but imo they are overpriced and underperform. I stumbled across this little generic brand on Amazon called Ravpower
It's 30 bucks for 10,000 mAh!! In comparsion, Mophie is like 2-3000 at most for +100 bucks. It's way cheaper and you get much more power. You even get two plugs (one for phone and one for tablets) so that you can charge two devices at a time (and your phone will love you for letting them charge their phone).
So I bought this and am totally happy with my purchase. If you need juice, you need to check this out!