You guys really using the battery until it runs flat? That is one real bad habit for lithium based batteries. It's better to do partial charging than doing what you guys do. It will shorten battery life.

You can remove it and clean it. Glass SP can be applied numerous times unlike plastic ones

I wash it but avoid touching them

4.4.3 is meh. I want my RAW camera yesterday

No one here buy any of the battery case like the Mugen? I really wanted one since the battery life is ridiculous, buying abother phone isnt much of a choice since I dont want to ditch the pure Android experience

I dont want another accessory on my pocket. Inconvinent to bring everywhere

The CPU is binned differently hence different undervoltage result. Kernel also have an impact on undervolting, the creator might or might not say this to us. For my phone I could undervolt the 300MHz to 620mV. The rest of the frequencies are fine at -75mV from stock, but the lower frequencies (under 1.5GHz) usually can go further.

Thing is undervolting CPU is good to increase battery life but the major battery eater on our phone is the screen, one of reason I hate FullHD resolution screen on phone.

Just changing the kernel is useless without tweaking it. Truthfully it really depends on your usage, you can undervolt, underclock so much but if you keep your screen on and browse or game a lot it still gonna eat battery.

Percentage? Your usage isn't the same as mine. If you browse a lot it could mean about up to 30 minutes or even more, if you been very crazy with underclock and undervolt.