i have a futaba 7c radio and i am in need of up dating the battery in the transmitter the factory batt is only 600 mah and i need more if i go to the field allday i endup haveing to charge it two to three times does anyone have any sugestions

switch battery chemistry to nimh instead of nicd you can likely get a 2000 mah pac

sounds like your battery has had it......you can go with a bigger capacity battery....Li Ion batts seem to hold a charge forever...good luck

lipo's do last long I think the lipo battery for your reciever is typically 2500 mah and the nimh is 2000 but you will need the added expense of a different charger for the lipo.

BBrown I have the same radio. Changed the battery to a 1450 nimh lasts all day.

I asked the same question in July. The following is the reply I received.
________________________________________________
Thank you for your recent e-mail.

The 7C can use the following batteries:

FUTM1457 NT8S600B TX NICD 600MAH 6DA/8U for $44.99
HCAM6362 NIMH 9.6V 1650 SQ TX U SANYO for $54.99

Any prices provided are Manufacturers Suggested Retail Pricing only. As a distributor, we support our dealers by selling directly to them. Typically your favorite Great Planes authorized hobby shop or mail order firm like Tower Hobbies ( http://www.towerhobbies.com/ ) is able to provide you with better pricing and excellent customer service.

To locate a dealer/hobby shop/retailer here in the US, please visit our web site and click on the "dealer locator" tab to locate a retailer or distributor near you. If you are in the US, click on the highlighted "retailer" and enter your zip code. This will provide you a list of dealers in your area. If you are an international customer, please click on the "international distributor" tab on our web site and you will be able to locate the international distributor nearest to you.

Sincerely,
John G.- PS9004
Product Support Lead Technician
Futaba Programming Technician
Great Planes Model Distributors
www.futabarc.com

instead of buying a 50 dollar battery buy a 7 dollar one, works just as well for way cheaper
ive been useing this battery in my 7c and 10c for over a year, lasts quite a while, id guess around 10 hours maybe more.
http://www.all-battery.com/96v2000ma...pack11417.aspx
while your at it stock up on 6v reciever batteries http://www.all-battery.com/60vrcairbatteries.aspx

what charger will i use with these batterys will the wall chargers that came with my radio work on them</p>

how many mah does your wall charger say it is for the tx

I have a Futaba 10C and I replaced the supplied 700mah battery with a HydraMax 1650mah NiMh battery. I got it from Tower Hobbies and it works great. I fly several planes from the same transmitter and never have to charge at the field.

Andy

Try Batterys Plus. They will build you one using the lead off of the old battery. Dennis

I have the new 2000 enerloop and it works great.

http://www.hangtimes.com/txpacks.html