This universal battery charger is perfect for all your charging needs. It is compatible with a variety of battery sizes including AA, AAA, C, D, AAAA, and 9V. The charger has a battery capacity of 4 and is made with alkaline chemical composition. It is a mains charger and has been tested to ensure it is in working order. The brand is Sharper Image and it is made in China. This charger is a great addition to your toolkit for multipurpose batteries and power needs.