The Refuel Go Charger is a must have for GoPro users, especially those going on multi day trips or filming all day. The size is compact so it's easy to store, it's a very simple product to use, and it's multi-functional. 

I recently went on an overnight fishing and camping trip. I only have a couple GoPro Hero 4 batteries which lasted me through the day but without the refuel I wouldn't have been able to film any the next day. Once we set up camp, I threw my GoPro batteries in the charger and tossed it in the tent and didn't have to worry about them. They were charged up and ready before going to bed, so while sleeping I was able to charge my phone via the USB out and one other GoPro battery at the same time. 

The LED indicators were helpful in knowing when my GoPro batteries were charged and how much juice was left in the Refuel. This is a very handy item to keep charged and with you on the go, whether for your GoPro batteries, your phone, or any other device that can recharge via a 5V- 2A USB port.