Use it for a while! Really good, Charges to Full and I can still charge one more time! The only Con about this is that it's too heavy, I don't think it is Li-Poly! But overall it's really useful and compact! When charging it gets a little hot! But it's okay to me and hope it won't explor when it's in my butt pocket!
It also doesn't need an extra charging cord, you can use the same cord that came with your iPhone
I recommend this seller!A+++++ The case works well
I have dropped my phone several times already and the screen has not cracked