http://www3.towerhobbies.com/cgi-bin/wti0093p?&C=MFB and
http://www3.towerhobbies.com/cgi-bin/wti0093p?&C=MFH
The hobbico nimh batteries are good batteries. They are a bit more sensitive to overcharge then nicd and self discharge a bit faster. However they are higher capacity and work really well.