Help Extend the Life of Your MacBook’s Battery
From mactipsandtricks:
“1) Only use the battery as needed. For example the less you use the battery the long it will last. Instead of using the battery only a little and then recharging keep it plugged in.
2) Drain the battery down. Although it is not as need as much, it has shown (on my battery) that by draining the battery down and then doing a recharge it seems to make the battery last as long as possible.
3) Keep your battery cool. Batteries are designed to run at around 15 degrees Celsius. So if you keep your battery really hot, for example using it outside all day, or two cold (inside a fridge). By keeping your battery at a good temperature you may keep the charge longer and more healthy.
4) Calibrate your battery. It keeps it up to date with the maximum and minimum battery capacity and helps you computer work out how to use its charge more effectively.
5) Keep firmware the latest. Download the latest firmwares and it will help. Although you may not see an immediate difference. It will help you keep it in tip top shape.
Finally buy a new battery. If you battery has really died, and has become a lump of metal it might be time to buy a new battery. Until we develop a battery that always keeps its charge you may have to keep replacing them every 18months.”
I've been a Mac fan forever. This blog is a supplement to my main website 
