Leaked screenshots show BlackBerry 10 OS photographed for posterity
will have a removable battery. A video shows that the cell is an 1800mAh capacity battery and will be used on the first two BB10 models which are currently code named BlackBerry London and BlackBerry Liverpool.
Heins has mentioned that there will be a total of 6 BlackBerry 10 models with 3 full touchscreen devices and three with a physical QWERTY keyboard. According to the sourcelink, the six devices include the R044 BlackBerry Nevada, similar to the BlackBerry Bold 9900 with a physical QWERTY; R061 BlackBerry Colt, which is the BB10 Dev Alpha device; R064 BlackBerry Wynton; R072 BlackBerry London, a 2G/3G model with a full touchscreen; R084 BlackBerry Nashville; R085 BlackBerry Naples; R086 BlackBerry Liverpool with 2G/3G/4G connectivity.
source: BlackBerryItalia via Crackberry