Let Wooffy help you identify the charge state of your batteries. Wooffy T. indicates the current battery state of charge with acoustic and also tactile signals.
You can test all conventional 1.5v and 9v batteries. Wooffy is easy to operate, you don't even have to bother about the negative or positive pole of the battery. Just put the battery on the corresponding contacts and you will get the result of the measurement immediately.
It is extremely slim and will comfortably fit in every pocket of every shirt or trouser.
You can choose between Wooffy which operates via acoustic signals and Wooffy T. which also operates with tactile vibrations.