Please be careful with these though. They're hard and sharp. You can scatch your valve or other parts and yourself very easily.
Versatile tester can be used with alkaline, Ni-Cd of Ni-MH batteries of the folowing sizes: AAA, AA, C, D and 9V.
One battery can be tested each time, and its strenght is shown on the meter of the tester.
A marker cleaner, lubricant and protective barrier in one easy application