I am planning on maybe replacing the NiCd battery in the Futaba 7C 2.4Ghz transmitter I am going to purchase with a higher mah NiMh version
http://www.all-battery.com/index.asp...ROD&ProdID=166
in order to get longer flight days but I'm a little concerned about 100% compatibility.

Is this a good idea? It doesn't look like the same shape. Any cons?

Just a little worried about putting a different battery in a brand new $300 radio.

Thanks in advance.