1.5 V. 813-4K. Long lasting guaranteed (For more details about our money back performance guarantee or leak-proof guarantee visit: www.rayovac.com/mbg). Leak-proof guarantee (For more details about our money back performance guarantee or leak-proof guarantee visit: www.rayovac.com/mbg). Guaranteed to provide long lasting power in high devices. (For more details about our money back performance guarantee or leak-proof guarantee visit: www.rayovac.com/mbg). 10 years power guarantee in storage. 100% recyclable card. Made in the USA with US and global parts.