Or so we thought. The battery, while up on top and otherwise ready to roll, is suffering from separation anxiety.

Even with our plastic card, we had to use excessive force to pry the battery out.

The 3.7 V, 3400 mAh (12.6 Wh) Lithium-ion Polymer battery in the Kindle Fire HD 6 is pretty hefty at 60 grams—about one fifth of the total weight of the Fire.

Amazon promises about 8 hours of use, but warns that "results may vary."