Universal digital battery tester for AA, AAA, C, D, PP3, 9V, 1.5V button batteries - Works without batteries

Small and portable: This small AAAA battery tester (BT-168D) is compact and lightweight, making it easy to carry. Tests various battery types: This tester is compatible with standard household batteries and rechargeable batteries, including AA, AAA, C, D, 1.5V, 9V, and button cell batteries. Battery-free operation: Clearly readable numbers indicate the charge level. No batteries are required; the battery being tested is activated. Easy to read: Portable and easy to read: The battery voltage is displayed on the LCD screen. Battery saving: Easily test the battery voltage to determine if its capacity is low or high, preventing the waste of a perfectly good battery.