I love my new Nexus and of course really love 4.0 ICR!!! I am considering getting the Extended Battery (2100 mAh) but looking for guidance from fellow Nexus owners. Is the Extended Battery Cover really necessary or needed when using the new battery? Just a guess, obviously the size of the 2100 mAh battery is larger than the standard battery in the device but I'm wondering if the extended battery cover is a "forced" purchase and not really needed. Anyone got opinions on this? Of course I am also considering the alternative which is getting a standard battery charger that comes with a battery.