Spire recently introduced a new, and very slim Power Bank to their lineup, helping your mobile gadgets last just a little bit longer throughout the day. If you haven’t guessed from the product title, the Spire Power Bank 4000 boasts a cool 4,000mAh Li-ion battery. Read on to see how we liked this unit and how well it performed.

Quote: "I absolutely love the construction of the Spire Power Bank 4000. It’s made of a nice quality aluminum, which is painted a grayish black color. The finish seems fairly durable, but really only time will tell how it wears. I put it in my pocket and backpack multiple times over the course of two weeks, and the time that I've had the Power Bank, I did not acquire any scratches..."



Link: Legit Reviews