Despite the advances in battery technology, MacBook owners still have one thing in common. The battery never lasts long enough. Even worse, the built-in battery monitor in OS X seems to give inaccurate readings when you need accuracy the most. All too often my MacBook’s 30-percent battery life drops quickly to 10-percent.
Battery Guard is a free Mac app that monitors the MacBook’s battery and gives you more details than Apple provides in OS X.
Install Battery Guard and check the battery’s status from the Mac’s Menubar.
For the same price (free) Battery Health gives you even more battery life information.
The Mac App Store has a dozen or so battery monitoring apps. One app that may help extend your Mac’s battery life is ResourceWatcher. It displays running apps and gives you options to quit apps that are using too many system resources.
For $1 more there’s BatterySqueezer which works much the same way by throttling apps in the background. This works especially well when you’re browsing through web sites which display Flash movies or animated advertisements.