I don't think it is substitute for your long running battery life.. but if someone is looking to just keep their phone "alive"… for $5 it's not that bad.. Don't beleive their specs.. just see if this fits into use and throw in few weeks time.
Cheers
2450 mAh Extra High Capacity, extra-long stand-by times
Compatible with Samsung Galaxy S2 i9100 Battery and charger
Light Weight, High Capacity & Low Impedance
Our battery is sent out with little or no power, so please charge it for hours before using
Specifications
Battery type Lithium Ion
Dimensions 5.9x4.6x0.5 cm / 2.32x1.81x0.20 inch (L x W x H)
Voltage 3.7V
Capacity 2450 mAh
Weight 32 g / 1.13 oz
Compatible with Samsung Galaxy S2 i9100
Package Includes
1 x Battery
Compatibility
Compatible with:
only compatible with SamSung Galaxy S II i9100
NOT compatible with the following phones:
T-Mobile Samsung Galaxy S II T989
Sprint Galaxy S / Spring Epic 4G with Slide-Out Keyboard
Sprint Samsung Galaxy S II D710 / Sprint Epic 4G
T-Mobile Galaxy S Blaze 4G
AT&T Samsung Galaxy S II Skyrocket SGH-i727
AT&T Samsung Galaxy S II HD LTE
U.S. Cellular Samsung Galaxy S II SCH-R760
oh no. please dont buy these batteries. They are actually something like 750mah realy not worth it. pictures online how people took off the outside cover to find 750mah printed on the inside.
http://www.google.com.au/imgres?safe=off&sa=X&biw=1280&bih=9…