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HomeAircraftHelicopterRadio - Spektrum DSM › Totally Confused on Lipos in the transmitter
02-07-2010 06:31 AM  8 years agoPost 1
hrosee

rrApprentice

Richardson, Texas

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I did a search and read all of the current topics on lipos in the transmitters. I see several sites that sell 3 cell lipos that they say are for Transmitters and have the plugs for the X9303 and Futaba.

Can these be used in mt X9303 without modification and without hurting the transmitter? I saw several old posts that talked about using a ouple of diodes in line with the positives but these are old posts. What about the new transmitter packs?

Thanks for any info.

2 - Raptor 50's V2

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02-07-2010 11:41 AM  8 years agoPost 2
hanzuki

rrApprentice

London, Ontario-canada

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I've been using a tx specific lipo, along with a few others for a while now. We don't charge the pack up past 12.2v and have reset our battery alarms to come on sooner. No problems with them and we only have to charge once a month, and it only takes about 15 minutes to charge them up.

The big difference that I can see between the tx packs and a standard 3s lipo is that the tx packs are only 03C and not 25C or 30C.

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02-07-2010 12:46 PM  8 years agoPost 3
bowies12

rrApprentice

Surrey - UK

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Be very very careful.

A fully charged Lipo is 12.4v
A Nimh is around 10.5v to 11v

A few people have had problems. Though it seems quite a few people get away with it.

JR dont recommend using Lipo in their older transmitters eg. 9303

My JR set has a 1500 Nimh battery and it lasts easily 3 or 4 weeks between charges. (around 4 or 5 flights on a Saturday and same again Sunday)

BTW, How do you reset the Battery Alarm to a different value ?

Fat birds can't fly

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02-07-2010 01:34 PM  8 years agoPost 4
Avropilot

rrVeteran

Murfreesboro, Tennessee

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I do not know of anyone having problems with it. I have Lipos in both of my tx. So does everyone at our field. Not even a hiccup. I think the only people that think that it is not a good idea are those that are not doing it. Anyone that has tried it will tell you to do it.

You can put a diode in line and drop the voltage .7 if you want. I personally dont see the need. The electronics in th tx's will probably handle more than 14v. Although I think I will not be testing that.

Waiting for parts

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02-07-2010 01:44 PM  8 years agoPost 5
hrosee

rrApprentice

Richardson, Texas

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JR Battery
I wonder how much longer the JR 2500 ma battery will last. That may be the saftesy way to go.

Anybody using one of those?

2 - Raptor 50's V2

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02-07-2010 04:51 PM  8 years agoPost 6
Over Torque

rrNovice

Pocatello, Id.

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does this mean that the 9303 regulator can handle a lipo if its programmed correctly?

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02-07-2010 05:15 PM  8 years agoPost 7
nappyroots2182

rrElite Veteran

Moline, il

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i have always used a 3s lipo in my dx7. i take it out to balance charge it EVERYTIME. never one problem. and my tranmitter always gets the full 12.4v. the problem i think is that some people want to charge it in the trans but thats not safe

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02-07-2010 05:27 PM  8 years agoPost 8
Hellsiege

rrVeteran

Colorado Springs, CO

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Two DX7's here both with lipos in them. Balance charge them on a seperate charger, and they register 12.6v when turned on. Been doing this for over a year w/out issue. The only thing to watch for is the voltage displayed is slightly higher then what the pack actually is on both of mine. If it says 11.6 on the radio they will read 11.3-4 on the meter when read prior to charging.

Anyone know how to change the LV alarm on a Dx7? That's slick on the 9303

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02-08-2010 05:35 AM  8 years agoPost 9
heli4ever

rrApprentice

USA

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Over Torque

how did you get that sceen ?

i've been using lipos 2years now

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02-08-2010 08:02 AM  8 years agoPost 10
blbills

rrKey Veteran

Provo, UT

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I'm also interested in putting a lipo in my DX7.

Keep the info coming...

Brian

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02-08-2010 03:51 PM  8 years agoPost 11
JetFire

rrKey Veteran

The Golden STATE

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I think the only people that think that it is not a good idea are those that are not doing it. Anyone that has tried it will tell you to do it
+1. Since I've used Lipos in my transmitter, I've never looked back.
The big difference that I can see between the tx packs and a standard 3s lipo is that the tx packs are only 03C and not 25C or 30C
Another +1. In fact, if your not that familiar with all the details.. I would only recommend the Transmitter specific LiPos.

I, personally, have never had issues. I don't own a 9303 and only speaking in general because I also know many local pilots who run LiPos on all their gear. The only issue I ran into was the battery dimensions because it changes from radio to radio depending on the size of your battery compartment. However, the TX specific LiPos simplify all that.


Trex700N Pro
DX8-2.4
Spartan/BL9088

-The ONLY way you fail is when you quit.-

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02-08-2010 04:43 PM  8 years agoPost 12
CEGLOBAL

rrApprentice

Lahaina, Hawaii - United States

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heli4ever

Here is the post on how to enter the service menu on the DX7 here on RR: (not sure if it is the same procedure on a X9303)

https://rc.runryder.com/t563038p1/?...x7+service+menu

about 2:40 of the youtube video is the screen for the voltage alarm.
The big difference that I can see between the tx packs and a standard 3s lipo is that the tx packs are only 03C and not 25C or 30C.
hanzuki is right. Before I started using a lipo in my DX7 over a year ago, I also researched the various websites for a lipo. What I found was that, you would have to look at the dimensions of the higher discharge rating (20C, 25C, etc) lipo carefully in order to fit in the bat compartment.

I got tired of looking around for a month and decided to just get the Tx specific lipo since the manufactures already got the dimensions. Besides, I thought to myself that the DX7 would not be putting a high of a discharge as most setups on a e-heli.

Changed to lipo and never looked back since.

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02-15-2010 06:42 PM  8 years agoPost 13
helipulse

rrApprentice

Toronto, ON, CANADA

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I have a fried do this mod for me:

http://dimensionengineering.com/app...pektrum_mod.htm

and I use the outrage trasmitter lipo -it works awesome.

I charge the lipo at max of 4.00/per cell...will last forever

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02-15-2010 10:03 PM  8 years agoPost 14
Jim-bob

rrApprentice

Little Hocking OH USA

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http://www.hyperion-world.com/produ...P-FG305-2100-3S

It's not a lipo but has anyone tried these yet??

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02-16-2010 05:47 AM  8 years agoPost 15
rchaas

rrVeteran

Tulsa, OK

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It's not a lipo but has anyone tried these yet??
yes, in my 12X. Works great, fits well, no diode needed since the nominal voltage is 9.9v. There is another thread in this section with lots of discussion of this.

Robbie

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02-17-2010 04:51 AM  8 years agoPost 16
turboomni

rrProfessor

East of the Equator

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I dont get it ,,why the bother of all this trouble?

Setup is everything, All my heli's can fly far better than I can pilot them

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02-17-2010 05:10 AM  8 years agoPost 17
mediclavina

rrApprentice

Shreveport, LA

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I dont get it ,,why the bother of all this trouble?
It makes the transmitter operate faster and increase the range.
Just kidding.

EP200 V2 (flybarless)
SRB Quark
Blade mSR

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02-17-2010 02:24 PM  8 years agoPost 18
turboomni

rrProfessor

East of the Equator

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[quote]It makes the transmitter operate faster and increase the range.
Just kidding.
[quote]

LOL!!

Setup is everything, All my heli's can fly far better than I can pilot them

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02-17-2010 03:04 PM  8 years agoPost 19
newtek007

rrApprentice

Newport News, VA

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I dont get it ,,why the bother of all this trouble?
Quite simply, if the stock NiMh batteries are working for you then leave it be.

In my opinion, NiCads and NiMh are becoming something of ancient technology in the battery world. I have gone LiFe and LiPo in everything I have from Transmitters to receivers. They are quick to charge and last forever compared to the old stuff.

I own a 12X. It has the WORST NiMh pack I have ever had the displeasure of owning. Brand new pack (2000mah) and it would only hold 1500mah. I had to go through a .2amp charge, discharge cycle and I still can only put in 1800mah. The battery pack will last for about 4 flights and then I'm done. At $82 per pack for the crappy JR pack, I decided to go with the Hyperion G3 LiFe pack. My transmitter will now last all day. when I charge it only takes 30 minutes. (I charge conservatively). And you do not need to add any diodes inline.

So again, this is only my opinion and this works for me and me only. I'm not interested in having to charge my transmitter with a walwart charger overnight to only get 4 flights. To me this is unacceptable with today's available technology.

Why use lighter fluid when gasoline works sooo much better! | http://www.newportnewsrc.org/

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02-17-2010 05:57 PM  8 years agoPost 20
Zaneman007

rrElite Veteran

Texas - USA

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Two Diodes
Makes the output of the lipo equall to the output of a Nimh. Thus, no worries on burning up the Tx and the voltmeter is useful.

Old Guys Rule!

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