Quickly test your battery status in seconds.Features a movable arm to secure the battery.Test various battery sizes with just one device.This device is truly useful if you know which batteries to store.Measures 1.5V, AAA, AA, C, D, and 9V batteries. It can measure if there is enough power for the pointer to directly display the measurement result.Indicated Color Introduction:Red (REPLACE): Indicates the battery needs to be replaced or charged as it's nearly depleted.Yellow (LOW): The electric quantity is low but can still be used for some electrical appliances.Green (GOOD): Sufficient power.Method to Use:1. For 9V batteries, connect to the two testing points on the side of the tester directly. Please pay attention to the positive and negative poles.2. For 1.5V AA and AAA batteries, slide the testing arm on the top of the tester to the side and secure the battery. Please pay attention to the positive and negative poles.Specifications:Item Name: Battery TesterMaterial: PlasticColor: BlackSize: 5x5x3cmPackaging List:Package Includes:1 x Battery Tester