Battery replacement in Cobra 7910?

You need to sync again your remote. This is done by following these instructions:
* Place yourself close to the car.
* Press both buttons on the remote at the same time till the LED goes out. As soon as you release them, LED will light stationary.
* Press button 1 for a second. LED will flash.
* Enjoy your new functioning remote.

Jona
February 2009

http://www.cobravehiclesecurity.co.uk/content/dealerAreaDocs/User_Manuals/8188-6_User_Instructions.pdf

Simon
December 2008