The brunton torpedo 2800 charger is the ideal on the go charger for fast paced commuters the brunton charger work in sync with the 12 volt cigarette lighter power socket in your car to get you back up to full power to prepare you for the day or again later on in the day brilliant for connecting pretty much all small electronic devices using their usb charging cables includes a input micro usb with an output dual standard usb the high grade polymer lithium cells charge faster and last longer