Battery tester also suitable for button cells hama
Test the charge of most smaller batteries including button cells and even power tool batteries this handy mini tester checks whether your batteries or rechargeable batteries are still ready for use or have to be replaced or recharged the test is carried out under load this results in a more realistic measurements analog display with 3 areas replace weak in order for button cells aaa aa baby c mono d 9v block passive operation therefore no power supply necessary