I found this battery and was thinking I might get into the boost circuit game with this one.
Have to purchase a new charger to go with it though.
LiFePO4 38120P (M size) Cell: 3.2V 10 Ah, 100A Surge Rate, 32Wh with 6M screw Terminal - UN Approved (3.0)
Then we have the really insane battery.
http://www.batteryspace.com/LiFePO4-40160S-Cell-3.2V-16-Ah-160A-Surge-Rate-51.2Wh-with-M3.4-screw.aspx
Have to purchase a new charger to go with it though.
LiFePO4 38120P (M size) Cell: 3.2V 10 Ah, 100A Surge Rate, 32Wh with 6M screw Terminal - UN Approved (3.0)
Then we have the really insane battery.
http://www.batteryspace.com/LiFePO4-40160S-Cell-3.2V-16-Ah-160A-Surge-Rate-51.2Wh-with-M3.4-screw.aspx