My battery is best its ever been on latest Froyo touch wood.
Been screwing around with phone loads, used bit of gps, bit of speedex, browsed, about 45 min of calls and it lasted 19 hours!!
Im happy.....i also bought a poratble small charger which you charge usb or mains and it can charge the nexus battery 2 times! only £30
(however never needed it yet)