PRECISE Battery Selector (BS-43920). Disc is a must-have for anyone who owns electronic items such as car alarms, wristwatches, cameras, or digital scales. With a total of 73 different battery sizes marked, you can be confident that you'll find the perfect replacement every time. Using this selector disc is a breeze. Just insert your battery into one of the slots on the guide, and it will instantly identify the correct size for you. No more guesswork or trial-and-error when it comes to battery selection. From the tiniest button-sized battery, like the AGO 416 (1.1 cm), to the largest coin-type battery, the CR2450N (2.4 cm), and everything in between, this selector has you covered. Each size is clearly marked and identified on the disc, ensuring a quick and accurate choice. Measuring at a compact 14.6 cm in diameter and a mere 1.6 mm thick, the selector disc is incredibly portable and easy to stash away until needed. Say goodbye to frustration and hello to convenience with the PRECISE Battery Selector Disc