with a new battery (and especially new rear) is the mobile phone much better in the hand - the factory condition is to explain to me only through targeted marketing effects. I would hereby reached (slightly thicker) form even prefer the same battery power! the new battery lasts longer and in fact the late evening is now also reached a little more relaxed, but must overnight the course unit continues always to the charging station. strong buy recommendation! (If only because of the better shape)