Dlyfull Universal Battery Tester with LCD Display, Multi Purpose Small Battery Checker for AA AAA C D 9V CR2032 CR123A CR2 CRV3 2CR5 CRP2 1.5V/3V Button Cell Batteries: Amazon.com: Electronics
Gardner Bender Battery Tester for 1.5-Volt Button Cell to 22.5-Volt Photo and Lantern Cells GBT-500A - The Home Depot