Hi firestone , I was on SP007 , I have just installed SP008 so not really used it , but with SP007 battery at 100% phone stated 22 hours , now in SP008 with battery at 70 % phone says 1 day + 18 hours , hope remains so !!!!
Edit : 100 % charged and shows 2 days + 12 hours
Mine is 10 days 10 hours (standby 12 days 12 hours) w/ underclocked + greenify + amplify. Lolol