Is the estimated 8.2 hours of battery life for the HP Envy 14 in the Microsoft online store accurate?

Microsoft listed in their store an 8-cell lithium-ion battery that'll last for an estimated 8.2 hours for the HP Envy 14-1011nr. While HP listed 3.75 hours for an 8-cell lithium-ion at the HP online store. Also, all the reviews I've read about the HP Envy 14 shows that its 8-cell battery runs on average of 3-4.5 hours on a single charce. Cany anyone confirm if Microsoft made a typo?



See for yourself.



http://store.microsoft.com/microsoft/HP-ENVY-14-1011nr-14-5-Inch-Notebook/product/60DA1685Is the estimated 8.2 hours of battery life for the HP Envy 14 in the Microsoft online store accurate?
Estimating battery life is never an exact science. Mostly it depends on what you are doing on a laptop. Browsing the web, emailing, etc. may get you close to that figure. Running a newer game, editing video, and other intensive software may cut your use in half. As I said, it all depends on what you are doing.Is the estimated 8.2 hours of battery life for the HP Envy 14 in the Microsoft online store accurate?
I think there's an add-on battery (in addition to the one included with the HP Envy 14) that extends the battery life further. So if you buy this add-on battery, you'll have twice the battery life from the combination of two batteries.



Still, most companies like to report the maximum battery life under light testing. Usually this means light internet browsing with no Flash content or maybe creating a few word documents. Things like heavy media editing, graphics-intensive games and high screen brightness settings can drastically reduce battery life.