For those who are getting worse life with 5.1:
1. Did you download off iTunes or phone?
2. Setup as new? Or backup?
I installed through iTunes and setup as new and my battery is great. 4 hours standby, 35 mins use, still have 100 %.
Might I actually be able to achieve the 200 hours of standby claimed initially?
As you can see it's been about 30 MORE minutes and it's STILL at 100% battery (10h 50m standby)