Confirmed: OnePlus 2 is smaller than the OnePlus One, but has a larger battery
First of all, we now know for sure that the OnePlus 2 is smaller than the OnePlus One (which sports a 5.5-inch display and measures 152.9 x 75.9 x 8.9 mm). However, this doesn't mean that the OnePlus 2 has a smaller display: rumors have it that it's still a 5.5-inch 1080p panel.
Another thing that's been confirmed during the AMA session is that the new OnePlus smartphone has a 3300 mAh battery, which should provide extended usage times compared to the 3100 mAh battery of the OnePlus One.
The quality of the rear camera (expected to be a 16 MP one) is of "high priority" for OnePlus. The company believes that "a bunch of things" related to the camera "will set the OnePlus 2 apart."
OnePlus is "most proud" of the design and build of its next handset, which likely means the device is made out of metal - just as rumored. There will be a OnePlus 2 for the US market (with LTE bands 1 / 2 / 4 / 5 / 7 / 8 / 12 / 17), and another one for Europe and the rest of the world (with LTE bands 1 / 3 / 5 / 7 / 8 / 20).
Other previously confirmed OnePlus 2 features include: a fingerprint scanner, an octa-core Qualcomm Snapdragon 810 processor, 4 GB of RAM, and a USB Type-C connector.
The new handset will be available to buy via "an improved" invite system. As previously mentioned, its price will be lower than $450. Finally, in case anyone was curious, we'll still be able to buy the OnePlus One after the OnePlus 2 is launched.
source: Reddit via OnePlus (Twitter)