Default SCH-i605 Note 2 8500mah battery

This is my first thread here abt my first extended battery. Verizon SCH-i605 Note 2 factory battery is good for 7 months but now I think it begins to blow. Looked up on Google and picked up a Mpj one. For regular usage:surf without many streamings, texing, apps on a regular basis, it will last easily for 2-3 days. I was afraid the weight might be a little too heavy but actually I barely notice the added weight since my bag is already too bulky lol. As for the case, well, I haven't been expected too much, just going to DIY it.