Sony reveals a new battery pack for the PSP-2000.  This new battery pack will give you 80% more battery life if you are using the one that came witht he PSP-2000, but if you are using a battery pack from the original PSP, then it will only gain you 20% more battery life.  Also the battery will back packed in with two colored plastic covers (black and silver) because of the size of the battery.  No word yet on a release date or a price.

Update: It  looks like Sony just released the price and the date for this new Extended Life Battery Pack.  It will be released sometime in December (hopefully before Christmas) and it will be priced at $44.99, so you guys might want to E-mail Santa back and update your gift list.

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Source: Joystiq