Im waiting to for someone to explain what power save does to the CPU...

Juice defender does nothing your thumbs cant do tbh bro but waste resources :thumbup:

 

CPU Power save mode dial down the speed to 1GHz. It actually keeps my s3 from getting too hot during long heavy use. I don't use juice defender anymore as it waste a lot if power itself. I use tasker and works much better, but it's a huge learning curve.

 

i have juice defender my battery lasted me 2 1/2 days without it, it lasts about 11 hours...i use the extreme setting on juice defender

 

I'd say if you are on mobile data for most of the day and/or have a bad signal Juice Defender can help a lot. If you're generally on wifi you don't really need it. Mobile data drains a lot more juice than wifi.