Hi there!
I'm on 8.4 Jailbroken...
Whenever i install a new tweak and battery dies fast, i remove that new tweak.
but umm its's some days now that i haven't installed any new tweak or update but battery dies so fast.
It made me hate my iPhone and don't like t o use it very much.
I installed 3 tweaks for make battery better but i think they don't work.
Here are some screenshots of my cydia installed tweaks, which one do you think uses the battery more?
( Speed Intensifier, seng, KeySwipe are necessary and i've installed them for a few months and i haven't have any battery problems i think )
https://goo.gl/pI9vvT
https://goo.gl/RMt1cz
https://goo.gl/LiJocd
https://goo.gl/EhvmvI
https://goo.gl/1vK7mc
https://goo.gl/r5EcIu
https://goo.gl/tMX0LJ