Universal Battery Tester, Digital Battery Tester, for AA AAA CD 9V Key Batteries 1.5V Battery Voltage Checker

General description Practical helper for checking the current battery level, this Universal Battery Tester is ideal for determining whether batteries are consumed or still usable. It can quickly measure battery voltage and digitally display the test results, making it a convenient tool for everyday use. Technical specifications Compatible with AAA, AA, C, D, 9V block, and button batteries Measurement points for 1.5V and 9V batteries Handheld design for easy reading Three-color simulation for clear results Usage Insert the battery according to the polarity direction Read the displayed voltage No additional power supply required Can test battery life anytime, anywhere