Hi. i've got a 3gs ios 4.2.1 custom firmware, unlocked with ultrasnow and activated with sam. had no problems untill this morning when i've form my battery at 4% and 4 hours of usage on it. I don't know how the 4 hours of usage got there, i've got push notifications on for two apps bot none received any , also my mail settings fetch data hourly and i received 10 email and one sms. This is not the first time i've received this many email or sms in a night but no of the times did i see 4 hours of usage and my battery gone. Got any ideeas ?
Also my multitasking had only ipod and my alarm clock running. I also have to mention there were no problems for the past few weeks with ios 4.2.1

Charged it to 100% and leaving no apps running, after 1 hour and 30 min in standby i've got 44 minutes usage, and i haven't used it more than 2 minutes

Any ideas?