If you’re using any of the latest gadgets, chances are you’ll be fairly familiar with the low battery warning signal on your gadget, since battery technology hasn’t really kept up with the development of other devices. Technocel is now offering its PowerPak XT ($50) and PowerPak DUO ($60), which hope to help keep your device juiced up, even when you’re on the road. It’s a combination of a charger and battery pack, so you can charge your USB-powered device from it when it’s plugged into the wall, at the same time, it’s also charging its internal battery. When taken out, it’ll function as a spare external battery for you to charge your device on the go. The XT should offer you an additional 4.5 hours of talk time, and the DUO will offer an additional 6 hours. If you travel with 2 USB powered gadgets, you’ll want to pick up the DUO, which offers 2 USB ports.