There are always times when our HTC Droid Thunderbolt seems to run out of power at the most inopportune times. Without a conventional charging source in sight, we are often left with no recourse other than to let the battery run out. Enter the Gomadic Portable Emergency AA Battery Charger for the HTC Droid Thunderbolt. Simply insert a fresh set of batteries into the battery pack, toggle the on/off switch and connect your HTC Droid Thunderbolt. Instantly the device will start to charge and you will be up and running again. Backed by our Gomadic Lifetime Warranty and over 10 years of innovation in charging accessories, we think you will find this to be one of your favorite accessories!