This battery replaces fully meet the original battery of my S3. I was initially a little skeptical part in my phone "installed", which is not original Samsung. But since I have been already purchased some products from mumbi, or used, I have married me and I'm thrilled. The battery fits perfectly into the holder, can be just as fast as the original load and keeps in normal operation (ie standby, telephony and SMS / WhatsApp ... but no continuous play) already by 2 days by. I had long gone ... especially since Android 4.3. And the price is absolutely great for this power supply. Absolute buy recommendation!