The Vintage Micronta Battery Tester, also known as Radio Shack Cat No. 22-031, is a reliable and compact device for testing batteries. Made by the renowned brand Micronta, this battery tester is essential for ensuring the condition and functionality of your batteries. With its simple design and durable construction, this product is a must-have for anyone in need of a reliable battery testing solution. Made in Korea, Republic of, this Micronta battery tester is a quality product that has stood the test of time.