The remaining time is only an estimate based on recent usage. The replacement battery for Apple MacBook Pro 15 A1286 (Early 2011 - Mid 2012), which you can use if the battery on your device needs to be replaced. My 2008 MBP - which only realistically gets about 1:30 per charge - often shows only ~1 hour (& 95% battery) left once it's finished booting but that then increases to sometimes as much as 2 hours depending on what I'm doing. New Genuine Original OEM APPLE early 2011 A1286 15' MacBook Pro A1382 Battery 56.99 46.39 (3 Offers) Save: 18 Free Shipping FusionTech USA StoreVisit Store View Details Compare A1382 Battery for Apple MacBook Pro 15' A1286 (only for 20) 77.5Wh New 38. What they don't say is which "25 popular websites"Īlso, your battery life can increase during use. Battery life varies by use and configuration. The wireless web test measures battery life by wirelessly browsing 25 popular websites with display brightness set to 50%. Wireless web testing conducted by Apple in October 2011 using preproduction 2.8GHz dual-core Intel Core i7–based 13-inch MacBook Pro units, preproduction 2.4GHz quad-core Intel Core i7–based 15-inch MacBook Pro units, and preproduction 2.4GHz quad-core Intel Core i7–based 17-inch MacBook Pro units. Used 13-inch MacBook Pro 8.1 Want to sell ( Came from Singapore) CPU: 2.4 GHz Intel Core i5 Memory: 8GB 1333 MHz Memory (2x4GB)-DDR3 Drives: 500GB SATA Disk Graphics: In. This is how Apple tests to get their battery life figures (it's a footnote on the product page):
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