This comprehensive pack contains 30 alkaline button batteries designed to power a wide range of electronic devices. These coin cell batteries are compatible with multiple device types including toys, calculators, laser pointers, cameras, clocks, watches, computers, games, digital cameras, camcorders, remote controls, electronic instruments, digital voice recorders, LED lights, and various other electronic appliances. The batteries are cross-compatible with several model numbers: 177, 376, 377, 565, 377A, AG4, D377, G4, GA4, GP377, L626, LR626, LR66, SR626, SR626SW, SR66, and V377. Each battery measures approximately 6.8mm (0.27 inches) in diameter and delivers excellent continuous power with high energy density for extended lifespan. For optimal performance and safety, store batteries in a dry and cool location, ensure proper directional insertion, avoid short-circuiting, and do not attempt to recharge or dispose of in fire. The package includes 30 individual AG4 batteries, providing ample supply for multiple devices or long-term use.