I seem to be seeing a battery issue as well, although I did not use Blackra1n to jailbreak but did install Blacksn0w to unlock
Phone: 32GB 3GS, Pwned using Pwnage 3.1.4 and the 3.1.2 firmware bundle. Hactivated, installed saved keys for push and youtube (see other posts in the general forum) then BlackSn0w to unlock (baseband 5.11.7)
Now on ATT 3G, and battery life seems to be about one third worse than it was yesterday when I was running on the standard apple firmware, I've already used about 60% of the battery and it's only lunch time!
Is there anything that I should check?
yes, set up as new. Should have mentioned this in the original post as I know it is an issue.
If you read this from the other " how do I do this" topic
I couldn't get the phone to get a signal on a hacktivated phone prior to installing BlackSn0w. (I was going to run with the ATT SIM for a couple of days before going to unlock)
Once I installed BlackSn0w, all worked.
I'm going to monitor battery life for the next couple of days and will report back.
Well, Apparently I spoke too soon
I restarted the phone again on thursday night and did a good hard charge with the wall charger over night. It's been pretty good on battery life since. (the same as it was before jailbreaking)