Dlyfull Universal Battery Tester with LCD Display, Small Digital Battery Voltage Resistance Checker for Ni-MH, Ni-CD, Li-ion, Alk & LiFe04 Batteries(AA AAA C D 9V 12V 18650 CR123A 2CR5 CR2032 Cells): Amazon.com:
Effective Battery Test Checker 168Max Digital Lithium Battery Tester for AA AAA 6F22 CR2032 Button Batteries Easy Carry - Walmart.com
How to check a coin CR2032 battery voltage using a small LED - YouTube
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