The Snap On Tools Vintage 12 Volt Battery Alternator Load Charge Tester # YA271 is a high-quality, single item product designed for testing lead-acid batteries with a voltage of 12V. Manufactured in the United States by the reputable brand Snap-on, this tester is a reliable tool for automotive professionals and enthusiasts looking to check the functionality of their batteries. With its durable construction and precise testing capabilities, this vintage Snap-on tester is a valuable addition to any collection of automotive tools and supplies. Pre-owned condition. See photos.