how do i replace the battery in the key for the honda
new key on 2004 Honda Accord
Go to the parts department at the Honda dealer usually the counter man will help you change the battery.
Your owner's manual might have something about changing the battery. They key for my Civic has a small screw that is really tight and was hard to get loose. Your key may be similar. Be careful if your remote has the screw because you don't want to damage the screw using the wrong size screwdriver