Any pro's/con's I should be aware of? Also what would be the charge rate for these packs?

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

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.

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

Is it safe to use LiPo’s in transmitters?

It’s 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 don’t exceed 9.6v or whatever your transmitter limit is.

How are you going to keep from violating the 80% rule?

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

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.

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.

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

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.

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

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

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

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.

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