Best battery without the bulk?

[Joe113]

What is the best battery I can buy, without the added bulk? Cause I have a REALLY nice case that I love, that would not fit with a battery that adds bulk.

 

[dad2noah]

2 x 2100mAh battery + US Wall USB Charger For Samsung Galaxy S 3 III I9300 | eBay

I bought that ( for $1 more than what it's listed at now )
The batteries don't last as long as the one that came with the phone, but it was still worth the whopping $10
And with the charger, you will never be without a charged battery

 

[Tkbredx]

2300 mah by mugen