The Weber Q series of grills are compact, table-top gas grills designed for residential use. The grills rely on 20-pound disposable LP gas cylinders, available at your local hardware store, home improvement center or big-box retailer. To light the grill, an electronic ignition system is installed on the handle of the grill, and is powered by a single AAA battery. If the battery dies, the electric ignition system will not produce a spark and the grill must be manually lit. To resume usage of the electric ignition system, replace the battery.
Grasp the ignition battery module, located on the handle of the grill and turn it to the left to remove it.
Pull the old battery out of the battery compartment and put in the new battery with the positive side inserted first.
Realign the battery module with the grooves and twist it to the right to secure it in place.