Don't throw away Good batteries. Test them first. The portable handheld tester by La Crosse Technology analyses one battery at a time. Test your rechargeable or alkaline batteries in the following sizes: AAA， AA， C， D and 3V lithium button cell batteries， also side contacts for 9V batteries. The compact size allows you to carry the tester with you on the go in a purse， camera bag， luggage or backpack. Simple operation: Select battery voltage， insert battery according to polarity， pressing tester to make contact you can read battery strength on LCD.

Simple operation in 4 easy steps: 1) select voltage range (1.5-Volt， 1.2-Volt or 3.0-Volt depending on battery type， 2) pull orange tray outward and insert 1 battery into the tester correct direction of polarity， 3) slide tray closed for positive connection and LED will display voltage and strength levels， remove battery when test is complete

Works for all: AAA， AA， C， D， 9V batteries and Lithium Ion button cell

Select 1.5V for alkaline AA， AAA， C， and D batteries

Select 1.2V for rechargeable AA， AAA， C， and D batteries

Select 3V for lithium button cell battery

Touch contacts on left side of tester for 9V battery