HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Mar 18, 2009, 01:11 PM
Mt. Dora, Florida
mtdoramike's Avatar
USA, FL, Mt Dora
Joined Dec 2006
4,040 Posts
Question
Thinking of trying the TX lipo for my Futaba 7C................

Any pro's/con's I should be aware of? Also what would be the charge rate for these packs?
mtdoramike is offline Find More Posts by mtdoramike
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 18, 2009, 01:36 PM
Registered User
So. Cal.
Joined Oct 2004
7,893 Posts
Many use them but with the availability of a significantly better alternative (Eneloops or other LSD NiMH), using a lipo in a TX is false economy and not worth the risk.

Lots of opinions here.

Mark
mrforsyth is online now Find More Posts by mrforsyth
RCG Plus Member
Reply With Quote
Old Mar 18, 2009, 02:44 PM
Registered User
Southern Ohio, USA
Joined Apr 2006
473 Posts
I'm using lipo's in my 7chp, 6ex, and my 7c 2.4 now for over a year. I reset the clock when I recharge. I'm showing right at 6 hrs on my 7c 2.4 and still at 11.9v....I wished I would have took the plung a long time ago....

There might be better batteries, but these will have to crap out before I look into getting different ones.
TooBizzy is offline Find More Posts by TooBizzy
Reply With Quote
Old Mar 18, 2009, 03:49 PM
Speed cost money.
highflier's Avatar
United States, FL, Marathon
Joined Dec 2002
3,044 Posts
I agree with Mark.

You risk damage to your lipo's

That could damage you TX.

Voltage is not right.

And with Enerloops you get a 2100 MAH pack that you can treat like a normal pack. Only difference is you can leave it on the shelf for months and pick it and and still have a charge.

Most Stock packs are 600-1100 MAH. Thus the Enerloops are 2-3 times more TX time between charges

Highflier
highflier is offline Find More Posts by highflier
Reply With Quote
Old Mar 18, 2009, 04:04 PM
A man with too many toys
United States
Joined Feb 2001
17,377 Posts
Is it safe to use LiPoís in transmitters?

Itís probably not safe to charge them while in a transmitter. If you take them out and charge them in a battery safe that would be ok. You should also use a regulator so you donít exceed 9.6v or whatever your transmitter limit is.

How are you going to keep from violating the 80% rule?
RC Man is offline Find More Posts by RC Man
Reply With Quote
Old Mar 18, 2009, 06:47 PM
Registered User
Southern Ohio, USA
Joined Apr 2006
473 Posts
11 pages of posts about the subject in this thread. Some good reading...

http://www.rcgroups.com/forums/showthread.php?t=821683

$20 bucks you can't beat it....Read the reviews.....

http://www.hobbycity.com/hobbycity/s...idproduct=6955
TooBizzy is offline Find More Posts by TooBizzy
Last edited by TooBizzy; Mar 18, 2009 at 07:07 PM.
Reply With Quote
Old Mar 19, 2009, 12:48 PM
7000mw of raw power!
rich smith's Avatar
New Hampshire (not the old one)
Joined Dec 2006
5,987 Posts
Quote:
Originally Posted by mtdoramike
Any pro's/con's I should be aware of? Also what would be the charge rate for these packs?
IMO bad idea. Ask this guy who forgot to turn TX off and puffed his lipos yesterday:

http://www.rcgroups.com/forums/showt...7#post11833441

Just one of many.

There will always be those who feel obligated to use newest and coolest "bleeding edge" technology whether it's appropriate or not.

Can't beat Ray-o-Vac et al "precharged" NiMh for that app. Same shelf life as lipos but cheaper and safer.
rich smith is offline Find More Posts by rich smith
Reply With Quote
Old Mar 19, 2009, 01:00 PM
Ignint McNugget
Rumple's Avatar
behind Jaggi lines
Joined Jan 2004
907 Posts
Quote:
Originally Posted by RC Man
How are you going to keep from violating the 80% rule?
Since your TX draws very little current from the lipo (compared to the current pulled from a lipo in most e-planes), the voltage reading on your TX is very close to the "resting voltage" of the pack. We know the resting voltage of a lipo is directly proportional to remaining capacity.

This means don't let the 3s TX pack get below 11.1V before recharging.

The mistake many make is thinking their TX pack can be bled down to ~3.0 to 3.3V/cell under this very low current condition, and they end up overdischarging the pack. Those numbers are for highly loaded conditions.

I love the lipo in my TX - I'll never go back to NiXX.
Rumple is offline Find More Posts by Rumple
Reply With Quote
Old Mar 19, 2009, 01:05 PM
Registered User
Raleigh, NC
Joined Apr 2007
4,679 Posts
I agree with Rich, you can't beat the Rayovac Hybrid or Eneloop batteries for use in a transmitter for safety and charge longevity. I put some Hybrids in my Optic 6 and will not change them for anything else. The 8 batteries cost me $20 and the holder was $1.89 from Radio Shack.

TooBizzy said "$20 bucks you can't beat it....", but if you destroy your transmitter it'll cost you more than $20 to get it fixed or replaced.

Bill
Sir Raleigh is offline Find More Posts by Sir Raleigh
Reply With Quote
Old Mar 19, 2009, 01:14 PM
Mt. Dora, Florida
mtdoramike's Avatar
USA, FL, Mt Dora
Joined Dec 2006
4,040 Posts
Quote:
Originally Posted by TooBizzy
11 pages of posts about the subject in this thread. Some good reading...

http://www.rcgroups.com/forums/showthread.php?t=821683

$20 bucks you can't beat it....Read the reviews.....

http://www.hobbycity.com/hobbycity/s...idproduct=6955
Actually you can beat that price. hey have the Zippy 2650 TX lipo pack for $17.95.
mtdoramike is offline Find More Posts by mtdoramike
Reply With Quote
Old Mar 19, 2009, 01:17 PM
Registered User
Raleigh, NC
Joined Apr 2007
4,679 Posts
Quote:
Originally Posted by mtdoramike
Actually you can beat that price. hey have the Zippy 2650 TX lipo pack for $17.95.
... plus $25.00 shipping if you have it shipped EMS.

Thanks, but no thanks.

Bill
Sir Raleigh is offline Find More Posts by Sir Raleigh
Reply With Quote
Old Mar 19, 2009, 01:21 PM
Registered User
Joined May 2006
270 Posts
There are draw backs to them both but if you are careful and don't leave your TX on and charge out of the TX then you will never look back. I have used the lipo from 2dogrc for three years now in my radio's and would never go back to round cells. JMO slowdragon
slowdragon is offline Find More Posts by slowdragon
Reply With Quote
Old Mar 19, 2009, 01:55 PM
characters welcome!
Mark Wood's Avatar
United States, CA, Bear Valley Springs
Joined Feb 2000
26,209 Posts
Quote:
Originally Posted by slowdragon
There are draw backs to them both...
Ok. I'll bite. What are the drawbacks to the Eneloops or Hybrids?

mw
Mark Wood is online now Find More Posts by Mark Wood
Reply With Quote
Old Mar 19, 2009, 01:59 PM
7000mw of raw power!
rich smith's Avatar
New Hampshire (not the old one)
Joined Dec 2006
5,987 Posts
Quote:
Originally Posted by Mark Wood
Ok. I'll bite. What are the drawbacks to the Eneloops or Hybrids? mw
They are heavier. I noticed some guys at the field have one arm longer than the other now.
rich smith is offline Find More Posts by rich smith
Reply With Quote
Old Mar 19, 2009, 02:08 PM
Registered User
Raleigh, NC
Joined Apr 2007
4,679 Posts
I guess my head being bent forward came from supporting the transmitter with those heavy Hybrid batteries with a neck strap. I'm sure my 70 years had nothing to do with it.

Bill
Sir Raleigh is offline Find More Posts by Sir Raleigh
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question Want to use my Futaba 7c Tx with Realflight G3... what's needed ? Al P Simulators 8 Jun 19, 2009 03:46 PM
Question lipo for my Futaba 9c, can I recharghe with the futaba charger? VirTus Batteries and Chargers 3 Jan 09, 2009 07:40 PM
Discussion Better battery for my Futaba 9C tx? WarrrEagle! Radios 12 Feb 10, 2006 09:17 PM
Which extra battery should I buy for my Futaba 9CHP tx EddieNewYork Batteries and Chargers 6 May 07, 2005 08:14 AM
whats the best lipo for my ?? pic waytoofast Batteries and Chargers 1 Nov 19, 2003 01:15 PM