This solar power bank is a great device for anyone who spends a lot of their time outdoors. Power banks in general are great for keeping your phone going for days at a time, but this case is built with campers and hikers in mind.

The power bank has a capacity of 10,000 mAh, which is enough to fully charge my Galaxy S5 three times over and then some. It has two USB ports, and charging two devices at once did slow it down a little but both were still charging at a good pace.

It can be charged with a micro-USB, like most power banks, but it also has a solar panel that can charge the battery over time. This is great if you're camping and nowhere near a computer or power outlet to charge the bank, but I did find that it takes a VERY long time to charge via the solar panel. If you can leave it all day in the sun it isn't a huge drawback, but if you only have four or five hours don't expect it to be charged too much by the end. Be aware as well that the box is all black, and it can get very hot when it's left in the sun all day.

The case is a really sturdy model, and it's waterproof so you don't need to worry about it in the rain. The case can take a fall without any damage, and I was impressed with how much punishment it could take without any problems at all. As an added bonus, the back of the power bank has a built-in flashlight, and it comes with an attachable compass as well, both of which worked just fine. The flashlight isn't going to light up a huge clearing, but for emergency use or indoor lighting, it does the trick.

Overall, anyone who needs a very reliable and sturdy power bank that they can take with them when outdoors should be well served by this product. If you just need a power bank for indoors use, you probably won't get much out of the extra features, but it still works just fine as a standard power bank.

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Pros
+ Great for hikers, campers and people who spend lots of time outdoors
+ Can be charged via mini USB or solar panel
+ Comes with flashlight and compass attached
+ Holds enough charge to power most smartphones multiple times
+ Case is waterproof and very sturdy

Cons
- Slow to recharge via solar panel
- Box gets VERY hot when left in the sun for a long time

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Note: I received this product at a discounted rate in exchange for an unbiased, honest review as provided here. As a consumer advocate, I believe in providing quality and honest feedback and receiving a product at a discounted rate will never affect my opinions.