We now have some new type of Batteries, they are LiMn2O4 battery, please kindly check our link:
24V 10AH, 36V 10AH LiMn2O4 Battery: With Plastic Case and can be fixed under seat very easily.
http://www.conhismotor.com/ProductShow.asp?id=162http://www.conhismotor.com/ProductShow.asp?id=16136V 14AH, 48V 10AH LiMn2O4 Battery: With Flat Aluminium Case and with our special rear bracket (only for 24-28 inches wheel)
http://www.conhismotor.com/ProductShow.asp?id=163http://www.conhismotor.com/ProductShow.asp?id=164