Hey I wanna share my experiences with this battery and I hope it will help others who are considering purchase :)
I can't post links so on the dealextreme this battery is under SKU code : SKU 106072
Little bit of backgroud:
After update my LG OB to android 2.3.4 (provider Vodafone CZ) I have encountered lot of problems - poor response, lot of lags, whole phone was very lazy
I have downgraded back to 2.2.2 make root and install custom rom [B]ravenous v4.0 xperiaS(v20n stock rom) 2.3.4 GB Deodexed!
This rom is great, fast response, no lags, nice design :)
With stock battery and original LG roms I have problem to reach 24 hours battery life, battery was draining too fast. I usualy get around 18hours and I have to recharge. That was reason, why I have decided to purchase bigger battery.
I am currently running with this ravenous rom and this extra battery and right now i have after 1 day and 15 hours 19% of battery remaining :)
I am very satisfied because with stock rom and stock battery my OB have to daily visit charger. With this battery I have more than 100% battery life.
I hope the duration of battery life will improve after few charging cycles.
Well the phone is pretty thick, but the weight is still OK, for me is the priority duration on battery.