Check battery condition before a dawn walleye run or a long trolling pass for salmon with the Boating Essentials 12v Battery Meter, a simple diagnostic tool that helps anglers stay ahead of dead batteries and charging issues on the water. This 12 Volt DC battery tester checks alternator output and battery state, giving you a quick read on the health of your boat's electrical system before you fire up electronics, pumps, lights, or a trolling motor. Easy-to-read LED lights make assessment fast at the dock, in the garage, or at the ramp, and the magnetic backing adds convenient hands-free placement while you test. The blue PMS 3005 housing rounds out a compact, practical tool for routine battery checks on marine and other 12V systems. Tests alternator output and battery state for quick electrical system checks Suitable for all 12 Volt DC battery systems used in boats and other equipment Easy-to-read LED lights provide fast, clear assessment Magnetic backing and blue PMS 3005 housing add convenient handling and visibility