Small and portable: small AA battery tester (BT-168D), small and light, easy to carry. Testing Different Types of Batteries: The battery tester fits standard household and rechargeable batteries. AA, AAA, C, D, 1.5V, 9V, coin cell tester. Battery Free Operation: Easy to read numbers indicate power. No battery is required. It is activated by the battery under test. EASY TO READ: The handheld device is designed to be easy to read: The battery voltage is displayed on the LCD screen. Power Saving: You can easily test the battery voltage, determine whether the battery capacity is low or high, and prevent us from wasting a perfect battery by throwing away a good battery. Product Description You have tons of batteries all over the house and you can't find the correct one to replace? Still not sure which battery to keep and which to throw away? Why waste time inserting and removing batteries when you can test them? This handy battery tester helps you get the most out of your battery. Tests the battery in seconds and lets you know when it's time to buy a new one. Quickly assess whether the battery is good or bad, without affecting the viewing of exciting football matches. Easy to check the power of toys. Essential for home use, easy to use Easy to use: insert batteries according to polarity - read and do! The slider can adjust different battery sizes and the three-color simulation shows clear results without additional power The battery tester can be used to test the following battery specifications: 1.5V ----- AAA, HP6, MN2400, RO3, AA, HP7, MN1500, UM3 C, HP11, MN1400, UM2, D, HP2, MN1300, UM1 and coin cell. 9V ------ PP3, MN1604, 6F22, 006PA no power supply Electrical requirements: It can quickly measure the battery voltage and digitally display the test results. It is small and easy to carry, and can easily judge whether the battery is good or bad. It is a good helper for family identification. . Battery quality: Red = Replace Yellow = Poor performance Green = Good Simply by analog display pointer to identify battery condition. Note: 1. You can simply test the battery voltage to see if the battery capacity is low or high. It will not directly and accurately identify the battery capacity 2. Remember: the battery tester is started by the battery under test and the test duration should be as short as possible to avoid unnecessary battery consumption.