The easiest (and least affordable) way to dramatically increase the runtime on any mobile device is to buy a higher capacity battery. The Sony Vaio P isn't setting any records with its standard 2-cell battery, so the extended 4-cell battery (VGP-BPL15) is most likely a must-have accessory for mobile users. It adds just 4 ounces to the total weight of the unit, isn't too much of an eyesore, raises the device at a slight angle for more comfortable typing, and of course increases battery life.
I'll put together a runtime comparison of the two batteries after some testing [Update: Battery test results now available], but here are some photos of the large capacity battery ($129.99) in the meantime.
The extended battery is also compatible with the Vaio P leather case I reviewed the other day:
See more Sony Vaio P features and reviews.
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