A handy and compact Mercury Universal Analogue Battery Tester suitable for testing AA, AAA, C, D, and 9V PP3 batteries, as well as button cells. It features an easy-to-read analog display with a needle that indicates the charge status as "good", "low", or "replace/recharge". This tester measures batteries under load for accurate indication of their charge state and has dimensions of 110 x 61 x 28mm, weighing 104g. It is ideal for both trade and home users, offering simple operation and a portable design.