Having trouble starting your Jeep Compass even with a good main battery? Seeing a “Stop/Start Unavailable” warning or random electrical issues? The small auxiliary battery can fail and drain the main battery, causing widespread electrical problems—especially with frequent city driving and auto-stop use. Haynes Manuals provide step-by-step instructions for replacing both batteries safely, with diagrams to ensure proper reconnection. Find your vehicle manual at haynes.com. #HaynesManuals #HaynesSh