Energizer CR1616 3 volt lithium

Finally popped one into my keychain laser level and it's been holding steady for weeks, exactly the reliable 3V lithium power I needed.

The 3-volt output is perfect for my small car key fob, and the lithium chemistry means I won’t have to change them for ages. No flickering or weak signals, just steady power.

I put these in my laser pointer and they've been working perfectly for weeks now. The 3 volt lithium power holds steady, which is exactly what I needed for consistent performance.