Hi bobtbarber,

Yes, our radio transmitters are "diode protected" to prevent accidental overcharging.

While some people have done this, it is NOT recommended to try to "jump" the diode, as this can cause serious damage to the unit, and will void your warranty.

You may want to purchase our Polyswitch, and install it on your "out of warranty" older radio. This will allow you to cycle your batteries in your transmitter.

Or you can send your transmitter into our service center to have this installed on your "in warranty" radio.

For information on sending this in for this service, please see our website at:

http://www.hobbyservices.com/futaba-rates.html

I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.

Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician
Also you may want to check our Website at (http://www.futaba-rc.com)