Should be no problem posting here, probably lots of beginners with similar questions. Hmmm, where to begin with the answers.

1. Ni-cds are fine, but if I had a choice, I would return the ni-cds and buy ni-mh. The only reason I have ni-cd battery packs is they come with most of the radios here. When I buy extra batteries, they are always ni-mh. For the same size and weight the ni-mh will have 2 to 3 times more power. This means longer flight times. Ni-mh also do not have the memory problems that ni-cds have. You do not need to drain the ni-cds every time before charging them. It's something you should do occasionally. Do a google search and you will find more info.

2. I would also consider returning the charger. I've got a bunch of Futaba chargers. They are ok, but there are more general chargers on the market that are much better. You should be able to get one that will charge your transmitter, receiver, and other batteries if you decide to go electric. A good charger will have peak detection which automatically determines when the battery is charged and slows the rate to trickle so the pack does not get overcharged. Note, if you buy ni-mh batteries, be sure the charger is suitable for them. The safe charging rates for ni-mh and ni-cd are different.

3. Can you find another hobby shop? You should be able to buy ni-cd or ni-mh battery packs that are already assembled.

4. While you are shopping you should consider buying a small voltmeter to test your receiver batteries. The meter should include a small load to simulate the operation of the receiver and servos. You need this to monitor your battery at the field to make sure you do not try to fly when the battery gets too low.