Energizer 357/303 Batteries, 1.5V Silver Oxide Button Cell Batteries, 3 Count (Pack of 5)

Customers find these batteries reliable and great value for money, particularly noting their compatibility with vintage HP 15c scientific calculators and other devices. The batteries fit well in various devices, including Harbor Freight Digital Dial Calipers, and provide good power. While some customers report they last a long time, others mention they don't last as long as expected. Customers disagree on the ease of opening the packaging.