Joined: Jul 2007
Posts: 8,576
Likes: 3,510
From: South shore, L.I., NY
Bikes: Trek Emonda SL7, Cannondale Topstone, Miyata City Liner, Specialized Chisel, Specialized Epic Evo
The 2 Garmin's I own (1000 & 1030) as well as the Hammerhead K2 I own can all operate while connected to an external battery.