QUOTE(milky @ Dec 16 2010, 09:15 AM)
just ordered my MBA 13" CTO just the 4gb ram upgrade only.... yahoo.. btw normally how does u guys charge the batt? use until 90% only charge or 50% ?
The best advise is from Apple :
http://docs.info.apple.com/article.html?pa....6/en/9036.htmlQUOTE:
Calibrating your battery ensures you get the longest possible running time from it. Calibrate your battery during the first week you own it, and then recalibrate it every two months. If you use your computer infrequently, it’s best to recalibrate it at least once a month.
Whenever you purchase new batteries, calibrate them as well.
To calibrate a portable computer battery:
1.
Plug in the MagSafe Power Adapter and fully charge the battery.
When the battery is fully charged, the light on the MagSafe Power Adapter connector changes to green and the Battery icon in the menu bar indicates that the battery is charged.
2.
Allow the battery to rest in the fully charged state for two hours or longer.
You can use your computer during this time as long as the power adapter is plugged in.
3.
With the computer still on, disconnect the power adapter and continue to use your computer.
4.
When you see the low battery warning, save your work and close all applications. Keep your computer turned on until it goes to sleep.
5.
After your computer goes to sleep, turn it off or allow it to sleep for five hours or longer.
6.
Connect the power adapter and leave it connected until the battery is fully charged.
You can use your computer during this time.
This website is also quite useful to understand Apple's batteries: I'd say is a must read for new MacBook users: I just quote here one part of it:
http://www.apple.com/batteries/notebooks.htmlStandard Maintenance
For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Apple does not recommend leaving your portable plugged in all the time. An ideal use would be a commuter who uses her MacBook Pro on the train, then plugs it in at the office to charge. This keeps the battery juices flowing. If on the other hand, you use a desktop computer at work, and save a notebook for infrequent travel, Apple recommends charging and discharging its battery at least once per month.