Description There are many models of batteries at home and you can't tell whether there is electricity or not. Are you afraid of wasting them when you throw them away? This digital battery tester can help you solve these troubles. Feature -All kinds of batteries, easy to detect the power: Suitable for No.1/No.2/No.5/No.7 battery /CR2032 button cell /LR44 button cell /9v battery /16340 lithium battery. -No need to install a battery, you can measure it by putting it on: it is easy to push and pull without any power supply, and the operation is simple. -Two detection interfaces: 9V special battery detection interface, which is more convenient and fast. -High-definition large screen, ABS plastic material: the size is only the size of a palm, which is more convenient to store and carry, and controls every safety detail.