You should've used that money towards this external battery. Holds enough juice to charge an iPhone 6 at least 11+ times in comparison to the 1.75 times with the mini. $18.99 with code J29D3UMJ
Keep in mind that you're sacrificing portability, but if you're sporting a Camelbak then it won't really matter. Plus, if you're camping then it's also handy for those with you over the weekend that may need it. I personally have this external, but the one I link caught my eye on a deal site and thought I would share.
Big ups for anker. I use my 2nd Gen e5 all the time. Plus it it's only like 40 bucks. http://www.amazon.com/16000mAh-Portable-Charger-External-Technology/dp/B00N2T7U90
Yup, for only $10 more, can get one that is 16k mAh.
Anker all the way. I've seen several others in my area using the same brick as me. http://www.amazon.com/16000mAh-Portable-Charger-External-Technology/dp/B00N2T7U90/ref=sr_1_1?ie=UTF8&qid=1425485591&sr=8-1&keywords=anker+16000+mah