The Galaxy S7 and the Galaxy S7 edge both passed through the FCC a few days back. The regulatory body certified models of both handsets for Verizon, AT&T, T-Mobile and Sprint, confirming that they will be available from all four major carriers in the United States. The specifications of these handsets have already been leaked multiple times and it was expected that the Galaxy S7 edge will feature a 3600mAh battery. A screenshot taken from the FCC filing of this handset reveals that it does indeed feature a 3600mAh battery.
There's no luck for the Galaxy S7 though as the FCC ID and label position document in its filing don't include the screenshot but it's expected that this handset has a 3000mAh battery. Both flagships are going to feature larger batteries as opposed to the Galaxy S6 and the Galaxy S6 edge, Samsung took a lot of flak for not offering a removable battery with those flagships. Perhaps the increased capacity is going to eliminate some of those concerns this time around. Samsung has scheduled an event for February 21 where it's going to formally unveil the Galaxy S7 and the Galaxy S7 edge.