2400mAh PowerGen Extended PDA Battery for Dopod 818 / HTC Magician / O2 XDA II MINI / Vodafone VPA Compact / T-Mobile MDA Compact / Qtek S100 / i-mate JAM - W/Silver Battery Door
Horrible, the battery worked for a month and then it popped or something.  I had purchased a number of them and many have done this.