The Rezap Battery Engineer Universal Battery Charger and Tester RBC883 is a versatile product designed for charging and testing various battery sizes including AA, AAA, C, D, AAAA, and 9V. Specifically designed for high drain devices, this charger is compatible with NiMH batteries and operates at a voltage of 9V. Manufactured in China, this battery charger and tester from Rezap is a reliable and efficient solution for powering your devices.