DLYFULL Dlyfull Universal Battery Tester with LCD Display Battery Checker Voltage/Power for AA AAA C D 9V 1.2V Alk & Rechargeable CR2032 CR123A CR2 CRV3 6V 12V 3.2V 3.7V 18650 1.5V/3V Button Cell Batteries

Wide Compatibility: The universal battery tester is suitable for rechargeable batteries and alkaline batteries. It is fully compatible with A, AA, AAA, AAAA, C, SC, D, 1.2V, 1.45V, 1.5V, 3V, 3.2V, 3.7V, 6V, 9V, 12V, lithium-ion 26650, 21700, 18650, 16340 (CR123), 10440, CR2, CRV3, 2CR5, CR-P2, A10, A13, as well as various button batteries (LR621, CR2032), etc

Quick Tester: When tester cylindrical batteries, you need to place the anode（+） of the battery into the corresponding battery slot of the tester, and the tester pen will make contact with the cathode（-） to start the test. For button batteries and combination batteries, simply place them on the corresponding battery slots for testing

Accurate Tester: With a high-resolution LCD display, it can accurately show the voltage (V) and battery capacity percentage of the tested battery, allowing you to better understand the battery's status

Battery Self-check: It includes two AAA batteries for testing the normal operation of the tester. You can long-press the "CHECK" button on the tester to check the battery level of the working batteries

Battery Classification: With this universal battery tester, you can easily distinguish between good and old batteries, or determine if a device is not working due to a malfunction or battery issue. It can also prevent the unnecessary waste of batteries that are still in good condition but are discarded due to unknown status