As you know that Untethered iOS 4.3.3 Jailbreak has been released and there are many ways to do it. i,e using Pwanage Tool, using Sn0wbreeze or using Redsn0w. Famous iPhone hacker i0n1c noticed that using latest Redn0w to jailbreak iOS 4.3.3 led to an improvement in iPhone, iPod touch and iPad battery lifetime. Here what he posted on his Twitter account
BTW: by using the latest RedSw0w you also might decrease the battery drain
Process Priority was not restored after the kernel exploit. That might have caused some battery drain.
If you need to jailbreak your device using Redsn0w, you can follow the guide here