Hello, i bought the new Andida 1800mAh batery.I used the one of theme in my HTC topaz,and its better batery then original.But in my OB is really different experian.If you want wake up OB from stand by,push the power button, you can see little "flashing" on the screen.I think, there is coming a more energy to OB, then original batery.Thats my experian, maybe its helpful for someone.