Home Diagnosis
Don't waste time battery swapping when a device fails. With this instant-read tester, you'll know if your batteries are the problem right away. The sturdy, compact device requires no batteries of its own to operate, so it's always ready to perform. The simple, color-coded analog display needle is easy to read, so you'll have no need to dig out the operating manual to translate the results.

Battery Testing Tips
You can test rechargeable batteries or standard alkaline with the BT-168 battery tester. Be aware that rechargeable batteries are a little lower voltage (1.2V) even fully charged compared to alkaline batteries (1.5V). They'll operate well even when reading yellow or on the low end of green. When testing, always make sure the negative terminal is positioned near the T-arm on the device. Button batteries will indicate the negative end.

Specifications
Universal Battery Tester For 9V 1.5V And Button Cell AAA AA C D Description 100% New Double easy-to-read color-coded scales indicate power level. Can quickly test the capacity of your battery. Compact size and light weight. Test multiple sizes of batteries in one unit. Perfect companion for travel. One movable arm to accommodate the battery. Two buttons on the side for testing 9 volt batteries. size: 10.8 x 4 x 2.5 cm. Test Multiple Sizes: 9V:PP3, MN1604, 6F22, 006P 1.5V:AAA, HP16, MN2400, R03 AA, HP7, MN1500, UM3 C, HP11, MN1400, SP11, LR14, UM2 D, HP2, MN1300, SP2, R20,UM1 and all kinds of button cells.