how much of a difference would there be b/t a 6 cell and 9 cell ion battery?

<p>im buying a dell xps m1530; is it worth delaying the shipping date for a month for the battery? how much more life should i expect?</p>

<p>should i just get the 6 ion battery and buy the 9 ion later if im not satisfied?</p>

<p>You should expect no less than 50% longer life.</p>

<p>I think it's worth the extra couple hours.</p>