Did you remove NFC and wireless charging or does it fit good with those? Are the dimensions the same or does the phone become thicker, so that the case doesn´t fit anymore?
S6 and s6 edge have connectors on different side of the battery. S7 edge and S7 will fit S6 but not S6 edge. There is no point doing S7 as that is only 3000mah and is same thickness as the S7 edge battery at 3600 mah.
In summary if you have an s6 edge you are out of luck. If you have an s6 flat do the s7 edge conversion.
I've done the conversion, S7 Edge lasts much longer, but unfortunately the rear glass does not fit anymore, there is a gap between the frame and the glass. I have Nillkin Frosted case which is hard case and perfectly covers the rear, eliminating the need for rear glass.
Well, they are pretty much the same, really...That's not quite "almost" the same size, the giant bulge created by the excess battery width is actually quite dangerous. All those exploding phones you see in the news, that's what happens when your battery is too big for the compartment it's in. Especially when charging, as the battery expands by up to 10%.
Good luck, and be safe.
Can you update your battery stats ?? i think after lots of calibration you should have a more accurate percantage right? i read on a spanish site that you need to charge the phone at no more then 2% after a week of calibration and never let discharge it complitely! can you share your stats pls?