Mac OS X Lion has TRIM support for SSDs, HiDPI resolutions for improved pixel density?

By Sean Hollister posted Feb 26th 2011 7:39PM As you'd expect, developers have wasted no time in tearing apart the Mac OS X Lion preview, and in so doing they've allegedly discovered some intriguing things -- namely, support for the SSD-wiping TRIM command, and a series of high-DPI display modes which would allow for icons and UI elements with twice the graphical detail -- which could mean a PC-sized Retina Display. The former doesn't sound like the most exciting upgrade, but it's truly a boon for Mac users with solid state storage, as TRIM can greatly improve write speeds in compatible drives. As far as the improved pixel density rumors are concerned, it's not clear whether Apple's actually looking at doubling display resolutions in new computers (9to5Mac imagines a 15-inch MacBook Pro with a 2880 x 1800 screen) or whether Apple's simply moving to maintain icons that are precisely the same physical size across all its displays -- which would make fantastic sense for a touchscreen UI, by the way.
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Apple patent application points to denser batteries, improved charging technique

By Sean Hollister posted Feb 20th 2011 3:31PM Some might think a ten-hour Macbook battery mighty fine, but we're happy to say that Cupertino's not quite satisfied. AppleInsider spotted a pair of Apple patent applications detailing a improved way of juicing up those lithium-polymer cells, which should greatly increase the number of recharge cycles they can endure -- or, optionally, allow Apple to use denser batteries that last longer on a charge. We'll break it down for you: the graph in the upper-left shows how Li-ion batteries currently charge, first very rapidly (constant current, increasing voltage) and then more slowly (constant voltage, decreasing current) to top the cells off.

What Apple's proposing is the multi-step method depicted on the right, where current and voltage trade off, to charge the battery while being far less harsh on the physical chemistry of the electrodes inside. As you can see in the bottom graph, the multi-step CC-CV cells lose much less of their potential after 300 recharge cycles, but that's not all Apple's cooking up -- the company figures that it can increase the thickness of the electrodes to improve battery life (by as much as 28Wh/L, according to one chart) without negative effect thanks to the softer charge. Sure, we'd rather have plant-eating graphene supercapcitors, but this sounds like a plan for now.

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