JR 9303 with Spk. Module and 11.1V LIPO?

[doeni]

Hi,
i have a JR 9303(well ok it is a McGregor 9xII but thats the same, just the british version..) with a 9ch, Spektrum Module attached.
Now, i have a brand new FP 11.1V Lipo with the right connectors on it.
Can i just use the Lipo, or do I have to be careful because it is a too high voltage? It will be steering my AP-Ship, don't want any risk because of the lipo

thanks alot!
Daniel

[Pinecone]

I see NO reason to use a lipo. It voids any warranties, can cause excess heat in the module, you have to take it out to safely charge it, you can damage it by leaving it fully charged, and you can damage it by leaving the Tx on too long. Lots of people are doing it, but will they fix your Tx if you damage it?

I use a pack of 2700 mAH Sanyo cells, that lasts longer, is the right voltage, charges with the Tx charge jack, can be left on, holds it charge for at least 3 months (longest I have gone between charges).

You can get them from:

www.cheapbatterypacks.com

www.batteriesamerica.com

[doeni]

You maybe right, only i already have the Lipo (was a freebee gift with my JR-Remote) and was thinking about using it..
Anyone else got experience with jr 9303 and lipos?
Thanks

Daniel

[Avetikus]

I've been using my CommonSenseRC transmitter pack 4c 2500mAh in my 9303 (72MHz) for almost two years now without issue. /shrug

[Pinecone]

Like many other things, it works fine unless or until it doesn't and you desttroy your Tx. may or may not happen.

Do you feel lucky???

Why, when there are such good NiMH packs these days.

[CNCjunkie]

I agree 100% with what Pinecone posted. Why would you want to take a chance and void your warranty? Just because you can, doesn't mean it's the right/safe thing to do.

2700mah nimh or the eneloops would be a much safer setup and would give plenty of stick time between charges. Warranty intact.

[wingtip]

I have been buddy boxing a guy and repairing a bunch of his wrecked birds... I have his 9303 radio for the repairs and it has a lipo battery in it. for the 3 weeks ive had it, been using it for setup, and for buddy boxing him, ive not had to charge it once at all... as far as i know he has been using this setup for quite some time....

so for me ive liked it so far... we just keep using it and never have to charge...(yet)..

[Avetikus]

I asked Common Sense RC if they had soem sort of tiny voltage regulator to go in the battery compartment to 'tame' the LiPo's a little bit and got back an interesting reply.

Taking the battery out to charge isn't much of a hassle to me. I just pop it in my clay pot and let the charger go to town.

I'll snip the relevant bits.

We do not offer a voltage regulator for transmitter packs due to the fact that the voltage difference of a fully charged LiPo compared to NiCD or 8 AA alkaline batteries is almost negligible. A fully charged LiPo will be 12.6V while a fully charged 8 cell NiCD will be 11.2V and 8 AA alkaline batteries will be 12.0 V.

From what we have heard from our customers, our LiPo packs work great with JR, Spektrum, Futaba, and many other brands of transmitters. Just as a note, always turn off your transmitter after use, because internal alarms for low voltage in your radio will be designed for NiCD cells and will be too low for LiPo batteries.

It seems to me that 12.0 volts from AA-cell bunny batteries is really close to a 12.6 volt LiPo pack. Mine happens to run at 11.4v right now, and 11.1 to 11.7 most of the time.

Then again, maybe I've just been lucky.

[Pinecone]

The problem is, the Spektrum Txes use a linear voltage regulator without a heatsink. The extra voltage is turned into heat inside the Tx case (no vents) and right on the RF board.

Your choice.