The Kindle Fire HD 8.9 scored 8 hours and 16 minutes in my test, nearly two hours less than the iPad, yet better than many tablets I've tested.

WSJ: How Much of a Tablet Can You Get for Under $300?

In addition, the chances of dying were 15 percent higher for those who sat 8-11 hours a day, compared to those who sat less than 4 hours a day.

FORBES: Why Sitting Increases Your Risk of Dying Sooner

As the latest in Goal Zero's portable, solar-powered ecosystem of products, the Switch 8 Solar Recharging Kit can bring back a dead smartphone instantly and replenish your battery in less than three hours.

ENGADGET: Goal Zero's Switch 8 solar charger bundle now available for $100