Battery charging on a large scale. When it comes to simultaneously charging larger quantities of AA or AAA battery cells, the cylindrical battery charger case from Voltcraft leaves nothing to be desired: Up to 40 channels are available to supply power to the energy packs. Numerous functions for care and maintenance: From automatic shut-off to detection of battery defects and capacity testing, as well as overcharge and overvoltage protection, a wide range of features are available to ensure optimal charging and maintenance of the batteries. Each of the 40 channels is read and revised separately. The charger comes with a power cable and user manual.