Hey,

I just built a battery here 48V, 10AH using the 10amp LIFEPO4 Battery cells and can be recharged up to 2,000 times. Cost me $450, including the case, quick connects and PCM circut board. It weighs about 13lbs or 6.5kg. I mounted this on an electric bike MTB carbon fiber frame with a 48V hub motor, 500watt - 589RPM. All of which I made. The frame is carbon fiber so it is super light weight and fast. The motor controller I used is an 8 bit NEC MPU which has regenerative braking power, pedal assist and three electronic speed programmed. This means that in the third electronic gear, I can get 115% of the motor power, so I can get insane speeds up to 50MPH. Because of this I am using WINZip disc brakes and shimano drive components.

The LIFEPO4 Battery cell is somewhat new technology and is a green product I believe.

If anyone wants anymore info on this please send me a message dalpos2000 at Yahoo dot com