Remove two Phillips screws and the battery lifts out easily.

The battery is Model No. S11S01A. It's a 3.7 V, 1530 mAh lithium polymer battery. The battery weighs in at 31 grams, just over 10% of the Kindle's total weight.

The wireless card is also easily removable by removing two Phillips screws.

There are two antenna ports on the wireless card, but there was nothing connected to the AUX port in our Kindle.