battery for macbook 2009 macbook pro 13 battery condition

#Battery for macbook 2009 macbook pro 13 battery condition Bluetooth#

(1) Was my first test, when I realised the keyboard backlight was on, and it must have been a good ¾ of the time. Keyboard backlight was disabled and so was 'Automatically adjust brightness'. Screen was set to never goes to sleep nor display screen saver.

#Battery for macbook 2009 macbook pro 13 battery condition Bluetooth#

Test were done on brand new macbook pro, with original hard drive, wifi on (using 802.11n 5.8GHz, 3 metres away), bluetooth on, backlight set at 4 out of 16. Repeat every minute (so the Flash page is showing 2/3rd of the time). Open Safari, open a window to, display the page for 20s then refresh the content.Ĭlose the window, open another window to (it has flash animations changing all the time).

With a combination of browsing site without flash and one with. jyavenard - Friday, Jlink I ran my own test, similar to the one listed here.POST A COMMENT 113 Comments View All Comments Apple claims its unique battery chemistry and microprocessor managed charging (Adaptive Charging) is responsible for these gains but it’s a difficult statement to prove we’ll have to wait and see what happens after a few years of use. Apple claims that most cells will hit 80% of their life after 200 - 300 charge cycles, but its special lithium polymer batteries will hit the 80% mark after as many as 1000 charge cycles. The result is slight variations in charging current designed to optimally charge each and every cell apparently reducing wasted charge cycles significantly. The extended life is supposedly due to an on-battery sensor that communicates with the system's management controller that can dynamically sense the needs of each lithium polymer cell and feed that info back to the charging circuitry. Apple claimed that this battery would last for five years before it needed replacing and resulted in up to an 8 hour battery life. Then came the new 17” MacBook Pro, without a removable battery. It gave Apple a very thin battery that allowed it to create the MacBook Air’s sweet form factor. I suspect this part of the equation has more to do with cutting costs than saving space though.Īpple first used this lithium polymer battery technology in its MacBook Air. Not only does this make the batteries more compact, but it also gives you greater capacity since you’re using all available chassis volume for the battery.Īpple also found that it was wasting space in the removable enclosure for the batteries as well, so its lithium polymer offerings are no longer user removable. Lithium polymer cells aren’t made of cylindrical cells (they’re rectangular), so there’s no wasted space. In order to continue to drive laptop thinness down, Apple started experimenting with using custom lithium polymer batteries instead of the industry standard lithium ion parts. This wasted space translates into larger batteries than are necessary, which makes for larger notebooks. The problem with these batteries is that they waste a lot of space within a notebook (try cramming a lot of cylinders into a box, you end up with wasted space). Standard lithium ion batteries are made up of cylindrical cells, similar to AA batteries. The old specs used to be up to 5 hours.Īpple did some clever work on its own here.

Look at the battery life row in the table above Apple is claiming up to 7 hours of battery on the new MacBook Pros. Of course there are different models within each one of these categories that you can purchase, but they are irrelevant to the discussion we’re about to have. There’s only a single MacBook model and it’s the white chassis that’s been around for a while now.Īpple added a 13” MacBook Pro to the lineup to fill in the gap, although it’s not clear to me whether this 13” MacBook Pro uses the same LCD panel as the old 13” aluminum MacBook or a derivative of the 15” MacBook Pro’s panel, which is superior. If you want an all aluminum body, you have to buy a MacBook Pro. I was so focused on the iPhone 3GS and Snow Leopard announcements from this year’s WWDC that I almost missed the gravity of the MacBook Pro announcements.Īpple announced price drops on nearly all of its laptops.