Here we are in the WILD HARE SUPPORT FORUM talking about servos and batteries for a .40 sized Funtana...something is wrong here...

Do you have anyone helping you at your club? This battery question would be a great one to get help one on one, with people that are able to give you the ground up discussion on chargers, capacity, and weight of the battery choices you have.

You will need a charger besides the one that came with your JR 9303 if you want to charge anything more than a stock JR battery. Once you get up to 2700mah and 6V you'll need a compatible charger. If you don't have anyone to help you in your club, do a search on chargers for your particular battery type here on RCU, read all you can about charging the type of battery you select, the different chargers that are available, and the pros and cons to each one.

Constructive critisism...what ever you do, ask the questions in the correct forum. It will help you get the best answers. We all want you to succeed.