Extech BT100  

Extech BT100: Battery Capacity Tester

Checks battery condition in seconds while the battery is in service

The Extech BT100 is a Battery Capacity Tester. Product can be used to test the condition of batteries quickly and easily. As an AC milliohm-meter, the tester measures DC voltage and AC resistance while the battery is in use, helping to save time on repetitive testing trials or large quantities of batteries.