Duracell Coppertop C Batteries, 2 Count (Pack of 1), C Battery with Long-lasting Power, All-Purpose Alkaline Batteries for Household and Office Devices

Customers find these batteries to be the best on the market, with a 10-year lifespan and good value for bulk purchases. They work well in various devices, with one customer noting they power everything from kids' toys, and customers appreciate the brand's trustworthiness. However, some customers report issues with leaking battery acid.