Your universal adviser on the subject of batteries and accumulators. Shows you in seconds how fit your energy supplies are, for the widest range of batteries and accumulators - from 9V blocks, through standard commercial 1.5V batteries, to special photo and button cells. The following battery types can be tested:micro (AAA), mignon (AA), baby (C), mono (D), 9V block, coin cells 1.5V and 3V. Power is supplied through the micro (AAA) batteries provided. Dimensions: (WxHxL) 85x22x 120mm.