Although we don't you update to iOS 5.1, or you will lose your untethered jailbreak, but still iOS 5.1 get some nice feature to look forward to, some users who have been using iOS 5.1 are reporting a significant improvement in battery life after installing iOS 5.1, according to a thread on reddit.
"I thought they were making BS claims, but after a few days I can honestly say that yes... I've seen a dramatic improvement on the life of the battery. Kudos to the power saving iOS devs," writes ruffyamaharyder.
Other users have chimed in with impressive numbers:
"Currently at Usage 7 Hours, 46 minutes, Standby 3 Days, 20 Hours..with 17% left in the battery.. Was at 100% when I did the 5.1 update.." [Trizlo]
"Since my last charge after updating, I went from 100% battery to 40% (when I decided to charge it) on 5 hours of usage and 51 hours of standby." [zinger2112]
If you've updated to iOS 5.1, let us know if you've noticed a difference in battery life.