Get yourself some of these, £11.70 posted
http://cgi.ebay.co.uk/TX-Pack-9-6v-N...item35a21667ba
make yourself one of these .
http://www.oople.com/forums/showthread.php?t=60418
I use one to charge my 3vcs. You can charge at 1c from your charger in nihm mode instead of the futaba,s trickle. You can give you tx a decent top up between heats during meetings if needed.