I purchased the Socket Mobile Power Pack to extend the number of hours that I can use my Garmin Edge 305. In testing and in real use during my 435-mile tour last weekend, it worked very well, proving its utility for its original purchase purpose.

Well, I thought I could probably run multiple devices in parallel using some type USB splitter. I have not located a simple parallel USB device that gives me multiple USB ports. The only device I’m aware of is a USB hub. I have an EdiMax Hub and the desire to power my small iPod speakers for my iPod using the Socket, as well as other devices.

Last night, I set up a prototype proving my thoughts are correct. IT WORKS! The hub can be use to distribute the Socket voltage to the 4 hub USB ports, providing the current requirement does not exceed 500mA.

The external speakers require 6 volts at 300mA. The Socket package includes an adapter that meets this requirement. So, I am able to power the Garmin Edge and the speakers from the Socket. That saves buying batteries for the speakers and the weight of those batteries. I do have the added weight of the hub–55 grams. Three AA batteries where to have given @ 22 hrs. run time. Now, I only limited to the battery life of the rechargeable Li-ion Socket Mobile Power Pack. I’m sure it will meet any single day’s travel.

I am pleased my concept is valid. I also intend to power my digital voice recorder using the Socket. I’ll explore that later.

Post Note 6/2/2006: Although the concept is valid, the EdiMax puts too much drain on the battery, i.e., the battery charge is consumed in a day. I may well make parallel USB ports that will not drain the battery.