Battery Statistics
HeadWay 38140S - 3.2 volt 12 AH
LiFeYPO4
$25.00 USD
Voltage range: 2.0V - 4.0V
Current (max): 120A
Power (max): 384 W
Weight: 12.3 oz
Size (inches): L-1.50 W-1.50 H-5.51
Volume: 12 cu-in
Total energy: 38.40 watt-hours

Links...
HeadWay
38140S spec sheet
Cost: 1.54 Wh/$ ($ 0.65/Wh)
Weight: 49.77 watt-hours per lb.
Volume: 3.11 watt-hours per cu-in
Cycle life...
2000 cycles @ 80% DOD - 61.44 kWh
1500 cycles @ 100% DOD - 57.60 kWh
Life cost: $ 0.41/kWh
497 watts (max)/lbs.

Charging Information...
Voltage (max): 3.6 V
Current (max): 60 A
Power (max): 219 watts
Build a pack with this battery...

Series batteries: Parallel batteries:
Cost: $
Watt-hours per mile:
Optional pack title:
Metric

http://www.zuglet.com/batteries/batteryPack.php?id=1043&cost=25.00&whpm=400