AG1 and LR621 Batteries are ideal for powering simple electronics such as toys, Laser Pointer Insulin Pump, Heart Rate Monitor, watches, Cameras, Calculator, Car Security Alarm, Keyless Car Remotes, Organizers, Computer equivalent(memory backup battery) CMOs providing consistent power and extending playtime without frequent maintenance. It is often selected for child's small battery toys and ensures that they remain active and entertaining for extending periods. It is equivalent to SR621SW, SR60, SR621, SB-AG/DG, 280-34, T, V364, D364, 602, S621E, GP364, AG1, AG-1, L621, LR621, SG1, LR60, LR620, SW621, GP164, 364X, 364A, AG1/364A, SB-AG, E364