Universal Button Battery Checker Tester (AA, AAA, C, D, 9V) Quickly identify which batteries are worth keeping and which should be replaced. This universal battery tester provides an instant, easy-to-read indication of remaining power—helping you avoid wasting usable batteries. Key Features Instant power check for 1.5V and 9V batteries Easy-to-read, color-coded meter shows battery condition at a glance Three clear results: Red = Replace Yellow = Low power Green = Good Simple operation: place the battery between the two contact points to test Supported Battery Sizes 1.5V Batteries AAA: HP16, MN2400, R03 AA: HP7, MN1500, UM3 C: HP11, MN1400, SP11, LR14, UM2 D: HP2, MN1300, SP2, R20, UM1 9V Batteries PP3, MN1604, 6F22, 006P Usage Notes The tester is activated by the battery being checked. Keep test times as short as possible to avoid unnecessary battery drain. If the needle does not move, ensure the battery is touching both contacts before assuming it is completely dead. AAA battery not included. Product Specifications Specification Details Type Battery Tester Supported Voltages 1.5V, 9V Color Black + Red Material ABS Package Contents 1 × Battery Tester