Along with the 6 Plus, iExperts (hosted on iFixit) are also doing a teardown of the smaller iPhone 6, which required mangling the smaller 1,810 mAh battery to get it detached. A more complete teardown of the phone is coming later.
The iPhone 6 and 6 Plus go on sale today after being introduced by Apple last week. The phones are the largest Apple's ever made, and likely set to be the company's best-selling. At the beginning of this week, Apple said that preorders in the first 24 hours topped 4 million, though the company did not go into specifics about which one was the better seller.
For many more photos and details on the components, head over to iFixit.
Update September 19th, 12:05AM: with new details about the RAM and camera module.