Lel. Slow charging =/= quality charging =/= battery last long =/= less heat.

Phone are designed to be able to accept certain amount of mah. I didn't do enough research for Mi3, but let's just say it can accept only 1.2amp, then even if you use 2amp, most it will get is 1.2amp.

Yes, quality of the cables do affect the input.

Yes. In play store. Look around for it. Currently using android tuner battery monitor widget.

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Added on
Finally good to see this phone thread stop spamming unnecessary post about pb/delivery(I still see this).
Sold off my mi3 to my friend. Played for 1 week. Still don't like miui

Also funny, I did spam (iirc, I only spam 1-2 post, and that's in v4) about delivery of my first batch Mi3 (didnt bother for 2nd batch Mi3) and yet I still complain about the amount of spam of the delivery bs on this thread.
I did spam post of payment at v5 though which I regret until this day.

Yet, when I post some question, it got totally ignored. Nice thread tbh.

Since everyone is posting regarding the pb sale. I manage to grab 4.

Order number : Order placed on：2014-06-03 12:01:08 2xpb
Order number : Order placed on：2014-06-03 12:00:28 2xpb