Sony reveals an officially licensed external battery pack for the Vita will be sold by the company but didn't state how much of an increase in battery life the external battery can add nor the price.
All they said is by adding the external battery with the regular one, there is enough juice to last for a cross-country trip from New York to San Francisco or vice versa.
http://www.screwattack.com/news/exte...e-battery-life