I've become the kind of person who absolutely swears by a good power bank, as I use my phone all day at work and at home, and the battery life is never, ever enough. I've also started playing some heavy drain mobile games. This power bank from Jackery is a small, lightweight device that provides a good amount of backup power without being as big or bulky as some other models I've used. Even though I'm phsyically weak and tire easily, I find I can hold this in one hand without straining it or getting sore.

The power bank holds enough power for more than three full charges of my Samsung Galaxy S5, and the charging speed was very good. It has three lights on top to indicate the level of power remaining, and a built-in LED flashlight which is strong enough to be useful in a pinch. This device is much lighter than most of the power banks I've used, and is much easier to carry in a bag or in my pocket.

I like that it automatically begins charging when I plug it in, so there's no worry about forgetting to press the button. I also love the coating. It's nice and bright and while it looks easily scratchable, I'm pretty rough with my power banks and I'm very impressed that there's no scratches yet!

The one downside I would say is that this power bank has only one USB port, so you can only charge one device at a time. This isn't a dealbreaker, but I do like having the option to charge two phones at once if I need it. That aside, this is a great power bank that looks stylish, works well, and is easy to bring with you on a daily basis.

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Pros
+ Lightweight
+ Provides lots of backup power (more than 3 full charges of a Samsung Galaxy S5)
+ Easy to carry, great for travel
+ USB cord included is long enough to charge phone while still using it
+ Comes with built-in flashlight
+ Doesn't scratch easily.
+ Cool design.
+ Charges automatically.

Cons
- Only one USB port

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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.