I have a $12 Walmart model, it has a brand but I can’t remember it. It’s about 1″x1″x 6.5″. I keep it in a sunglasses bag. It works well and even has a built in speaker which is great.
I don’t use it as much but it rides in my GO bag. Over a few weeks it finally trickles down to nearly nothing. I want one of the lipstick sized ones eventually.
I use a GoPro Portable Power Pack I got for our GoPro’s here at work. It has duel USB connections so I can power my phone and my wife’s at the same time. Or my phone and my iPad mini when I travel. I keep it in a small cheapo case I got at Dollar General.
Out of all of these, it’s the Anker Power Core Fusion 5000mAh with fold-out AC plug. You can plug it in to charge the internal battery and use it as a USB wall charger at the same time. Perfect size and capacity for EDC power backup for my iPhone.
[IMG]