Battery capacity tester BT168D: Put the battery directly Display the remaining battery capacity, more intuitive than the BT168. A one-time rechargeable battery with a voltage of 1.5 V, including: 5 (AA), 7 (AAA), 1 (D or larger), 2 (C or 2), series button batteries, etc. The voltage is 9 V disposable battery and rechargeable battery. Universal button battery tester AA AAA C D 9V Don't throw away which batteries are thrown away by guessing which batteries to keep. Place the battery between the two points of the battery tester. An easy-to-read display tell you if you have a fool. Or can you extend the battery life for a few more minutes. Check the power of all 1.5V and 9V batteries 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 checking the battery. Reduce test time as much as possible to avoid unnecessary battery drain. Item size: 110 x 59 x 25mm Note: AAA batteries are not included Colour:black+red Material:ABS Package Contents: 4 x BT-168D Battery Tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.