The battery is dead. The pointer is in the red area. 1. Disposable and rechargeable batteries with a voltage of 1.5 V, including: 5 (AA), 7 (AAA), 1 (D or large), 2 (C or 2), AG series button batteries, etc. 2, the voltage is 9 V disposable battery and rechargeable battery. From the position of the pointer, it can be seen that the battery charge is: 1. "Adequate electricity": GOOD-OK; 2, "insufficient electricity": the power of WEAK- is weak; 3. "No power": REPLACE-Battery needs to be replaced. Universal Button Battery Checker Tester AA AAA C D 9V Don\'t for Gue Which Batteries to Keep and Which to throw Away, Place your battery between the two points of the battery tester, and the easy-to-read display will tell you instantly whether you have a dud, or if you can eke out another few minutes of battery life. Checks power level of all 1.5V &9V batteries Easy to read, colour coded meter indicates power level Tests 1.5V miniature cells Three result: red=replace, yellow=low power, green=good If needle does not move,check that battery is touching both contacts before auming that it is completely dead. The battery tester may be used to test the following sizes: 1.5V: AAA,for HP16, MN2400, R03 AA, HP7, MN1500, UM3 C, HP11, MN1400, SP11, LR14, UM2 D, HP2, MN1300, SP2, R20,UM1 9V: PP3, MN1604, 6F22, 006P NOTE: The battery tester is activated by the battery being checked. Keep test times as short as poible, to avoid unneceary battery drain. Color: Black Item size: 110*59*25mm Note:AAA battery not include Packing content: 1 x Battery Tester