Before you attempt to maximize the health of your battery, you first need to determine if your battery is healthy or not. Whether you're traveling, at an off-site meeting, are not able to get the one table at your favorite coffeeshop next to the power outlet, or just cannot charge your MacBook for an extended period of time, you should know these secrets of power-saving.Ĭheck the condition of your battery. If you can't afford to run out and buy a new one, don't worry: there are still things you can try to help preserve and extend the life of your older MacBook's battery. The battery life of the brand new MacBook Air is an enviable 12 hours (or more, as some reviewers found).