I needed a quick replacement for my phone battery, which I somehow managed to lose! and this seemed to be a good value replacement. I use a lot of power from my phone, tethering my laptop to it via bluetooth to get on the internet, and constantly using it for various applications throughout the day. I had been using a 2800mah battery which lasted for a very long time, but was very bulky, so when I was looking for a replacement I opted for this instead. As expected it can't compete with that battery for capacity, but it generally lasts the whole day for me, and since I charge my phone every night, this works perfect for me. It's a solid replacement battery at a good price, and holds out even against my demanding power needs, so I recommend it.