Any recommendation for replacement battery (internal)?

Hi guys, my M7 battery life is atrocius and it exhibits all signs of dying battery (abrupt shutdown when battery shows 14 %, short battery life, overheating). I am looking for a replacement - if you have replaced internal battery, would you give me a tip for reliable source?

I know that price is no guideline - for my old HDD iPod, I bought several replacements already, they all cost same, but some were amazing, some died after a week. And given the difficulty of replacing M7 battery, I'd rather get a good one at first attempt :).

So, any tips? Experiences?

For start, I found one by an aliexpress merchant that sells recommended camera replacement: http://www.aliexpress.com/item/No-pu...285421722.html
Here's the battery: http://www.aliexpress.com/store/prod...285595239.html

Thanks!