Out of interest, here is the quoted battery life for a forthcoming Nokia yoof-fone with all its gadgets and gimmicks:
2.5-3.5 hours talk / 9 days standby
That's useless for a business phone! The similar figures for the 6310i were:
GSM 900/1800: 3.25 - 6 hours talk
GSM 1900: 4 - 7.5 hours talk
up to 17 days standby!