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Thursday, July 16, 2015

Product review: FAVOLCANO 20000mAh High Capacity Ultra-thin Dual USB Port External Battery

video

A lot of capacity comes in a fairly compact package, this battery is 6" x 3" x 3/8" and is 20000mAh. It has two USB outlets and one (fairly dim) flashlight.

I tested each USB port with current monitor with an Android phone and iPad Mini tablet. The battery charged iPadMini as well as the best power banks I have tested on 2A port. On 1A port did not provide optimal results because Apple products require more than 1A, but it provided a typical charge for a 1A port. For Android phone results were not as good. It underperformed on both ports, charging at USB rate on 2A port and below optimal on 1A port. I started running these tests when my Android devices had HoneyComb operating system. The charging rate is controlled by protocols between the devices and the battery. When they can't negotiate they get the default non-optimal rate. I was able to observe the improvements in Android OS as they adapted to handle Apple protocol on 2A ports. Before 4.21 I could only get fast charging on 1A ports, and would get bad performance on 2.1A port on my Android devices. After upgrade to Jelly Bean 4.21 I saw the same performance on 2A and 1A ports as it is controlled by the device negotiating the protocol with the charger. Now my Android devices typically charge similar in speed on both ports. So these results surprised me. This battery us using a protocol that Android is not able to handle well. If you are interested in the specific numbers, my video includes screen shots of the results.

Based on my test this power bank is better suited for Apple devices. It works with Android but not as well as with other power banks.

You can find it on Amazon by following this link.


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