Folks at iFixit use to tear down a new gadget, whenever they get in their hands. Now the same treatment has been meted down to the iPad 2.
According to iFixit:
After removing a few screws, the LCD was lifted off to expose the iPad 2’s 3.8V, 25 Watt-hour Li-Ion Polymer battery, a slight improvement over its predecessor’s. After disconnecting a few connectors, the logic board was revealed. The ICs were in the same combination as the original iPad.