Is anyone ready to see what extended batteries Samsung offers for this phone? I know they probably won't have one at launch, but I did some research and here's what I've found. The GS4 is about the same size as a GS3 and yet has a 2600mah battery, while the GS3 has 2100mah. The Razr HD MAXX is the kind of batteries with 3300mah, said to last an entire day and then some. However the GS3 has a 3000mah extended battery, that adds 1.1mm of thickness. Now if we assume the GS4 has a battery the same width and height as the GS3, then we can assume a similar thickness would add a similar capacity. Thus 1.1 mm added to the GS4 could net a 3500mah battery, that would mean a 9.0mm thick GS4 with a bigger battery than the phone that is the king of batteries, or if we bump it up to the 9.3mm of the Razr MAXX, we can get to 3745mah, go to 9.7mm we can have over 4000mah. That's still a pretty slim phone, and would net unbelievable battery life. So is anyone ready to see motorola knocked off its pedestal for battery life, with a thinner phone? Anyone still buying the whole claim that a non removable back is necessary, in order to get such amazing capacity? I for one can't wait to see a 3500-4000mah GS4 extended battery, particularly by Samsung.