Replacement 3.7V 1050mAh Battery for Sony Ericsson U5i/U8i/X8/Vivaz pro

Pros: You can buy this battery for a fraction of the cost of an original one. It works fine. It's the right size

Cons: The foil around the battery is a bit bigger than the battery itself, so you might wrinkle it a bit when you insert the battery.
It doesn't last as long as an original battery. I use it in a Sony Xperia X8 and it lasts for about a day and a half, on standby. The original lasts for more than two days on standby.

Other: It's a good buy. For a long holiday, without power supply, you might want to buy more than one.

Pros: Good battery replacement for much lower price.
The reported capacity is real.
Good build quality.
Fits very well in Xperia X8.

Cons: The capacity is a bit lower than the original battery (1050mAh versus 1200mAh of the original one)

Other: It worths the money.

Pros: very good price for the battery. the most important is, that it works fine in my sony xperia x8 cell phone.

Cons: the capacity 1050mAh is not enough for android smartphone. It does not last even 1 day, but in my opinion it is OK to use it as backup battery.

Other: For the price it is great purchase. If you have supported phone and you want to have extra battery for the case your original battery is discharged, buy this one!