The memory connector is a stacked memory design. The MacBook Pro (17-inch) supports up to 2GB of RAM, and the MacBook Pro (17-inch Core 2 Duo) supports up to 3GB. However, note that in the latter, while you will have a perfectly bootable system with two (2) 2GB RAM modules—
and even About This Mac will report 4GB of installed memory—the system will only be able to address 3GB of that installed RAM.
See MacBook Pro (Core 2 Duo): Memory Specifications for more information. Main Battery
Both MacBook Pro 17-inch models use battery packs built with the same lithium polymer battery technology used in our iPod product line, though the basic chemistry is no different than previous lithium ion cells. An unchanged battery controller keeps the battery calibration procedure the same as it has been since the PowerBook G4 line.
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