With this battery tester, you don't need to guess which battery to keep and which to throw away.

Features:

Check battery status
Dimension: 8(L) X 3(W) x 2.5cm(H)
Free size, battery from 1.5V to 9V are testable
Light weight and compact size
Suitable for AA-size battery, AAA-size battery, C-size battery, D-size battery, 9V battery, button cell battery, alkaline battery, lithium battery, rechargeable battery
No battery required

Using Indication:

Red-need to change, yellow-prepare to change soon, green-battery is ok.

Package Included:

1 x Battery tester