> "Battery life" usually means how long will battery last, before you need to replace it. No, it does not. "Battery life" means how long the device lasts on a

> "Battery life" usually means how long will battery last, before you need to replace it. No, it does not. "Battery life" means how long the device lasts on a fully charged battery before it needs recharging. What you were thinking of is called "battery lifespan" or sometimes "battery longevity", or even "battery cycles".