Garmin has joined forces with Powertraveller, the British specialty provider of portable power solutions. For Garmin’s “Edge 800” bike computer, which is expected to hit the stores this month, Powertraveller has developed a special edition of its “Powermonkey-Explorer”: The “Garmin External Battery Pack by Powermonkey-Explorer” is also compatible with all of Garmin’s outdoor devices and the sports watch “Forerunner 110”.