What kind of batteries are you charging?
What I want is to be charging while I fly so that I don't have to stop and wait for a charge.
I don't think they make charger cables that long.
It may be hard to find a charger that charges both the receiver battery and transmitter battery at the same time. They run at different voltages.
I have the Turnigy Accucel 6 that I like to use on all my batteries. It hooks up to a field battery box or plugs into the wall at the house using an AC adapter. It charges multiple battery types and I can set the charge rate.
Look at
http://www.hangtimes.com/nobsbatteries.html for good quality receiver batteries.