RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1937 views POST REPLY
HomeRC & Power✈️Aircraft🚁HelicopterRadio - Spektrum DSM › Is using a 3 cell lipo really bad for the radio or is it all just rubish?
12-20-2010 01:03 PM  9 years ago
Topic Vote0Post 1
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
Is using a 3 cell lipo really bad for the radio or is it all just rubish?
I looked into it when I first decided to go to a lipo battery for my DX-7 and felt satisfied the internal electronics were up to handling the full 12.6V of a fully charged pack. Now after nearly a year of trouble free use I started flying with an older group of pilots who are insisting my radio is destined to fail and lead to a crash.
What is the real deal here? Can the Spektrum radio's handle this voltage long term or not?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-20-2010 01:43 PM  9 years ago
rcmiket

rrVeteran

El Paso,Texas

MyPosts All Forum Topic
Been using one for 3 years in my DX7 along with several freinds. Not one issue what so ever. I love it.
Mike
"When Inverted down is up and up is expensive"
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-20-2010 06:21 PM  9 years ago
philip 01

rrElite Veteran

ft worth

MyPosts All Forum Topic
been using one for almost a year. works great.

know lots of folks that do as well. no problem.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-20-2010 07:09 PM  9 years ago
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
Thats good to know and jives with my personal experience so far. Thing is, why is this new crowd I fly with so concerned that impending doom is just around the corner. Does anyone know if there is any official word of how Spektrum feels about this?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-20-2010 07:23 PM  9 years ago
rcmiket

rrVeteran

El Paso,Texas

MyPosts All Forum Topic
They don't advise using them. That's the "official" stance. As for me like I posted 3 years no issues. One complaint though due to the plug they use connecting and disconnecting the plug into the radio is a P.I.T.A. I just charge the battery in the radio. Mine has enough wire to reach my charger balance and charge plug. I just do my radio charging while pulling maintenance on my helis so I'm right there if there was a issue. No big deal.
Mike
"When Inverted down is up and up is expensive"
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-20-2010 08:00 PM  9 years ago
rumbleweed

rrNovice

Maryland=USA

MyPosts All Forum Topic
The voltage regulator in the DX 7 is a linear regulator, which in simple terms means that the extra voltage above and beyond the voltage needed by the radio is dissipated as heat. Assuming normal operation this is usually not a problem. If you use the radio a long time during very hot conditions with fully charged abttery, it is possible that the heat buildup in the radio could damage or shorten the life of some of the radio components. If you want to use a lithium type battery, I suggest you use a 2S A123 type as the fully charged voltage is closer to that of a fully charged NiMH pack. This does mean you need to have a charger capable of charging A123 type cells.
SHARE  PM  EMAIL  Attn:RR  Quote
12-20-2010 10:07 PM  9 years ago
fastflyer20

rrKey Veteran

N. Tonawanda, NY

MyPosts All Forum Topic
I saw the post with a melted radio due to the lipo going berserk during charging and melting the radio. That was enough to convince me that I would never put one in my radio regardless of the electronic circuit being able to handle it.
I already have to watch the lipos charging for the electric heli's, so I run enelops in the TX and go to bed knowing my radio will be safely charged in the AM.

I know the chances are slim on the lipo going up in smoke, but not worth the risk IMHO.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-20-2010 10:46 PM  9 years ago
gorn

rrElite Veteran

Western Australia

MyPosts All Forum Topic
Ive used a lipo in JR, Spektrum and now Futaba.
Never had an issue.

Also, never ever charge a lipo in your TX.
Just a safety thing, as it was never designed to have that voltage pack in there.
Just made sense to me, to not charge through the TX charge jack.
For the love of the hobby
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-21-2010 02:45 AM  9 years ago
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
Sounds like most of what I'm hearing from my local group is pretty much unfounded. FWIW, I never charge the lipo in the Tx.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-28-2010 12:17 AM  9 years ago
helismash

rrKey Veteran

Gloversville, NY - Fulton

MyPosts All Forum Topic
I know a couple of people who are using a lipo in their JR / Spektrum stuff and have never had an issue. I have not chaged to the lipo yet but I am seriously thinking about it. The guys tell me they don't have to charge very often.Hey, Who put the ground there!
T-Rex 500/T-Rex 600N FBL/T-Rex 600E PRO/T-Rex 700N/T-Rex 700FBL
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-28-2010 12:32 PM  9 years ago
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
2711, I can certainly testify to that. I go many,many flying days without needing to worry about charging.
I went lipo before the now available reduced voltage Tx friendly LiFe batteries became available and have always had concerns about harming the radio itself. If I had to purchase a new battery for my Tx now I would get the LiFe pack as it does not need any modification and will last every bit as long.
Since I made this post I was informed to simply use two- 3Amp diodes in line to effectively reduce the voltage by roughly 1-1/2 volts. I did this minor modification to the battery and it works like a charm. Max voltage is now down to 11 volts @ full charge and no need to re-charge till it gets down to about 9.7-9.8 volts.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-28-2010 01:37 PM  9 years ago
helismash

rrKey Veteran

Gloversville, NY - Fulton

MyPosts All Forum Topic
ACKopter,
Thanks, I was wondering about the diode trick. If memory serves it's like a .6 volt drop per diode. I totally forgot about the LiFe stuff. I think that will be the way I go. I'm not sure but I thought someone said that you can charge them with any Lithum charger. Any Input on that?

Rocco
Hey, Who put the ground there!
T-Rex 500/T-Rex 600N FBL/T-Rex 600E PRO/T-Rex 700N/T-Rex 700FBL
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-28-2010 10:36 PM  9 years ago
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
I know the Lithium Ion batteries can be charged with a LiPo charger but am fairly certain you will need to have a charger that has LiFe capabilities. Reason being is the different "full" charge voltage between the LiPo/LiIo and the LiFe. Most of the current LiPo chargers should have this feature but make sure before you decide.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 02:39 AM  9 years ago
Ronald Thomas

rrMaster

Gainesville, Fl, USA

MyPosts All Forum Topic
Chris, I used a lipo in my Dx-7 as well as my X9303 2.4 with no issues at all. I am getting one for the Dx8 as well Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 02:49 AM  9 years ago
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
I never have nor do I know of anyone who has either but I have always had some concerns. If I had to buy new right at now I would definately spring for the LiFe chemistry as it puts out voltages much better suited for our radios.

BTW, you were right on the money about my last PM to you know who, it almost earned me a permanent ban. I have been put on notice!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 03:19 AM  9 years ago
philip 01

rrElite Veteran

ft worth

MyPosts All Forum Topic
Is using a 3 cell lipo really bad for the radio or is it all just rubish?
no and yes.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-29-2010 03:23 AM  9 years ago
ACKopter

rrApprentice

Florida

MyPosts All Forum Topic
Care to elaborate or are just going to keep us in suspense?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2010 03:24 AM  9 years ago
philip 01

rrElite Veteran

ft worth

MyPosts All Forum Topic
works fine.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-29-2010 03:27 AM  9 years ago
Hellsiege

rrVeteran

Colorado Springs, CO

MyPosts All Forum Topic
Used a 3s lipo in two dx7's for over two years now w/out issue. Down to one dx7 and a 10g now that uses a 2s lipo. Seems like I never have to charge and when I do it's an hour tops (I charge less then 1c on tx packs) and they are ready again for weeks of use.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-29-2010 04:39 AM  9 years ago
what_the_helli

rrKey Veteran

cookeville, tn USA

MyPosts All Forum Topic
I'm at 3yrs on a lipo in my 9303, no probs here.I put the fun in dysFUNctional :)
Team KBDD & Funding by TnPrintMasters.com
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1937 views POST REPLY
HomeRC & Power✈️Aircraft🚁HelicopterRadio - Spektrum DSM › Is using a 3 cell lipo really bad for the radio or is it all just rubish?
 Print TOPIC  Make Suggestion 

 9  Topic Subscribe

Monday, February 17 - 1:47 am - Copyright © 2000-2020 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online