Brand: Parts Express. MPN: BT-168D. See how much battery life is left with this digital battery tester. It displays how much voltage your battery has in it under a small load. It tests standard 1.5-volt household cells 1.5-volt button cells 3-volt coin cells and 9-volt batteries without using any wires. Carry this small 4.25 x 2.33 x 0.88 digital battery tester with you or store it in glove compartment tool box or small desk drawer. It has no internal batteries to replace. Key Features: Digital 1.25 x 0.63 display prevents guessing how much voltage is left in the battery Small size makes it convenient to travel with Built-in contacts eliminate the need for dangling wires and pointed probes 10 mA load helps deliver an accurate reading Battery Tester with Digital Display for Standard Size and Button Cell Batteries Test Household Batteries the Easy Accurate Way Many analog battery testers use a display that just states good or bad. This digital battery tester s 1.25 x 0.63 display shows the exact voltage your battery has left. Any reading below the stated voltage on the battery lets you know it s time to replace it. Make sure you hold the battery against the contacts for a few seconds for an accurate reading. Test 1.5V N AAAA AAA AA C D button cells 3V coin sells and 9V batteries without using any wires or probes. The red positive contact slides up and down to fit most 1.5-volt batteries and 3V coin cells while the negative contact is stationary. Touch a 9-volt battery to the top of the tester matching the plus and minus to see how much voltage it has left. Product Details BrandParts ExpressPart Number140-801UPC848864071435Unit of MeasureEachWeight0.1.