Read to use for up to 10 yrs (When not in use). Last 3x longer (vs Eveready carbon zinc in toys). 1,5 Vcc. Guarantee: We will repair or replace, at our option, any device damaged by these Eveready batteries. Guarantee void if batteries are charged by user or device. Contact 1 888 706-4100. Patents: www.energizerpatents.com. www.eveready.com. Made in Indonesia.