Battery Spy measures the time it takes for your battery to empty.

Monitor your battery uptime in simple, accurate and elegant way.

The counter starts the moment you unplug your AC adapter. Regardless of whether you unplug it at 100% or 65%, Battery Spy will count down the time it takes for your battery to empty (or until you plug in your AC adapter again).

It continues to show the percentage from the moment the adapter has been unplugged so you can easily track your battery lifespan, starting from any charge level.

Advanced custom algorithm calculates the remaining battery life time.
The calculation is based on the time the battery drops one percent of life plus the time the battery dropped to it's current state.
Note: the battery needs to drain at least 5% in order to give accurate life time.

What's New
  • minor update

  • Battery Spy (com.devotion8.battery-spy) is a Mac software application that has been discovered and submitted by users of The latest version that our users have reported running on their systems is Battery Spy 5.