Irish.. RadicalRC web site ( www.radicalrc.com) has a section on the diode issue on many transmitters. You can short it out, directions are provided. This allows use of the fast field chargers as well as cycling it in the TX. This also means you have removed reverse polarity protection from your TX and will void the warranty. It's your call if you want to chance it or not.

The diode prevents this reverse battery connection (well, protects it, not prevents it.. that's up to the user to prevent that sort of thing.. [] ) It gets shorted out by putting a small piece of wire across the diode, effectively taking it out of the circuit. Again, you take a chance with this, because if you ever put the battery in backwards, well, smoke time. The short side of it is you DON"T have to remove the battery to service it..

CGr.