911-65557 Battery Tester

Small, compact and robust and can be used to quickly check batteries and rechargeable batteries.  This battery tester is suitable for the most common battery types (type AAA, AA, C, D, N), button cells (with 1.2V / 1.5V / 3.0V) and 9V block batteries.
Since the device displays the charge status and the battery voltage in volts, you can quickly and easily check whether the battery still has enough power or needs to be replaced.