The power bank measures 4.8” x 2.8” x .4” and has one charging port rated at 2.4 amp. There’s four capacity indicator lights, a power button and a loop molded into the plastic shell that is suitable for a small carabiner or lanyard.

I received my sample of this product and fully charged the device. I tested the power bank using the same methodology I use for testing all such devices. Using a USB Load Inducer, I placed a 2.4 amp load on the power bank for 5 minutes and found that voltage only dropped to 4.8 volts , which is unusually good. I then used the load inducer and a power monitor that measures total power transferred (mAh), and placed a 2.0 amp load on the power bank and let the test run to failure. The power bank ultimately provided 2,448 mAh at 5 volts (3,308 mAh at 3.7 volts) before shutting down. I charged the unit back up and ran the test again, this time the power bank put out 2,516 mAh at 5 volts (3,400 mAh at 3.7 volts).

For real world testing, I hooked up my Galaxy Note 3 to the power bank through a meter (see uploaded pic) and the phone charged at full speed… 1.7 amps / 5 volts, which I’ve learned it will not do quite frequently from a power bank.

In summation, this power bank puts out around 85% of its stated capacity and easily meets its stated 2.4 amp output. The test results indicate that this performs in the “very good” category in efficiency of power conversion. I consider anything 90% and above of stated capacity stellar, 85% to 89% is very good, 75% and 84% is average and below 75% is poor. At the current price ($12.95 at time of review) this is a great buy, and well worthy of a five star rating.

Link: http://amzn.to/1S6wlmC

They offers $3 OFF coupon code N3ZQX2HE, which expires on 31/08/2016.