I don't know if NFC would prevent deep sleep, or if clean master would help ( I'd uninstall it ), but I've spent a lot of time researching battery life fixes, so here's some tips:
1. Get the Better Battery Stats
app - it's essential. You're most likely going to look under the Partial Wakelocks section from the dropdown. That'll help you narrow down which apps are keeping the device awake. Kernel Wakelocks are important too, but require some research into what stuff means. Select your reference point ( Boot, Unplugged, etc. ), then try to avoid using your phone for a couple of hours from that event at least before checking this app to get better results of what's causing issues.
2. After finding which apps are problematic, you can uninstall them, freeze them, or do the following if you prefer to keep using them without hurting your battery as much:
and hibernate the problematic apps. Hibernating an app prevents it from running unless you start it.
For extra measure, also get ROM Toolbox
( not sure if you need the pro version ), go to "Auto Start Manager", and uncheck certain things for apps ( like Facebook auto starting on location change, for example ) to lessen app wakelocks. You can also use the paid AutoStarts
app in the market with the red car icon if you prefer something simpler.
**Note: disabling certain autostarts can break a function of an app, or the whole app, until you enable it again, so be wary of that**.
3. I don't believe this is even an issue anymore, but some roms had issues going into deep sleep on multi-core devices. Eugene373's CPU Sleeper
should fix that. I haven't looked into this much though, so not sure whether it works or not.
4. I found this thread on the Skyrocket forums really useful when my phone was losing battery while charging: http://forum.xda-developers.com/show....php?t=1759541
Also, to save more battery, keep your screen at dimmest system brightness when you can, and turn off sync, data, & WiFi if you don't need it. GPS *should* be okay on all the time, because from what others say, GPS only wastes battery if an app is using it, so if you deal with the app, the GPS is fine.
Not sure if NFC prevents sleep or if clean master helps. Use Better Battery Stats
to find wakelocks. Use Greenify
to hibernate problem apps. Use ROM Toolbox
's "Auto Start Manager" or AutoStarts
to stop problem apps from auto starting.
Russian smashed across the interwebz from my Samsung Hercules. Please hit thanks if I helped.
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