I purchased three of the new T-Link 3's and would like to use a USB battery of mine as a backup. I bought a male-to-female USB cable and connected it to the USB connector where the battery usually goes. When I plug in my battery and power on the T-Link 3, the battery shuts off after about a minute. If I use the USB battery supplied with the T3, all works fine.
Am I doing something wrong? Seems pretty simple to me but it does not work with my battery.