RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 920 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › How to make a 6 cell battery from 2 x 3 cells
03-22-2017 10:13 AM  20 months agoPost 1
JoeB1

rrApprentice

Ireland, Wicklow

My Posts: All  Forum  Topic

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 01:02 PM  20 months agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

Of course you could save yourself much time and effort by buying a series adapter cable, keeping the two packs separate, and charging them as 3S packs.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 01:08 PM  20 months agoPost 3
JoeB1

rrApprentice

Ireland, Wicklow

My Posts: All  Forum  Topic

You could, but this is how to make a 6 cell battery as stated. Not two separate batteries added with cables.
Adding extra heavy cables is no good on a light quadcopter racer or small heli.
Its a good point though but not relevant here.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 01:18 PM  20 months agoPost 4
ICUR1-2

rrElite Veteran

Ottawa, Ontario

My Posts: All  Forum  Topic

I suppose if I ever have a couple of batteries lying around.

spending time, paying attention

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 01:51 PM  20 months agoPost 5
Ace Dude

rrProfessor

USA

My Posts: All  Forum  Topic

If weight is the primary concern then using a single purpose built 6s pack would be the best option.

  

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 04:26 PM  20 months agoPost 6
JoeB1

rrApprentice

Ireland, Wicklow

My Posts: All  Forum  Topic

Maybe the best option would be to look at the video before making an uneducated comment. Or even reading the information below the video.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 07:59 PM  20 months agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

Did watch the video first.

Not sure what I missed that would make me uneducated ..

"Today I'm going to show you how to make a six-cell battery......." is the stated goal.

Seems like a simple series cable does it without all the other sturm and drum.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 08:20 PM  20 months agoPost 8
JoeB1

rrApprentice

Ireland, Wicklow

My Posts: All  Forum  Topic

Thats funny. It had 98 views when I posted it here and still had 98 views after your comment

I can copy and paste too..
"Do you have spare batteries and connections lying around?"

Have a nice day

PM  EMAIL  GALLERY  Attn:RR  Quote
03-22-2017 08:57 PM  20 months agoPost 9
EEngineer

rrProfessor

TX

My Posts: All  Forum  Topic

"Not sure what I missed"

That was JoeB1...starring in his video.....

Logo 600SXs, 800XX, TDR IIs

PM  EMAIL  Attn:RR  Quote
03-22-2017 11:40 PM  20 months agoPost 10
Heli_Splatter

rrElite Veteran

USA

My Posts: All  Forum  Topic

135 views now... I agree with the others... use a combining connector. "lets see if the copter can take it". Laughed at that. I don't plug it in until I have done the research and determined the max voltage allowed. Smoke is not acceptable test method in my shop.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-23-2017 01:48 AM  20 months agoPost 11
JoeB1

rrApprentice

Ireland, Wicklow

My Posts: All  Forum  Topic

A combined connector will not fit on a quad racer. Not to mention the added weight plus I clearly state if you have batteries lying around and if your rig can take the voltage. Maybe on a bigger rig and yes I have used them on 700 size aerial heli and 800 hex rigs.
Chill out guys and look at the video AND description before commenting. I clearly state if you have batteries lying around AND if your rig can take the voltage. Its not as if you just plug it in and hope it works as one commented lol!

PM  EMAIL  GALLERY  Attn:RR  Quote
03-23-2017 03:52 AM  20 months agoPost 12
Flyin for Jesus

rrVeteran

Troy, IL. 62294

My Posts: All  Forum  Topic

I'll cut you some slack Joe, nicely done. I drive cars with a guy that has all these connectors and adapters and his buggy never makes it a whole pack before some sort of connector comes unhooked or a bad connection even when they are hooked together. . He will be forced to watch your video.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-23-2017 05:43 AM  20 months agoPost 13
EEngineer

rrProfessor

TX

My Posts: All  Forum  Topic

The diagram of how to connect the balance plug is definitely good to know, if you don't know....

Logo 600SXs, 800XX, TDR IIs

PM  EMAIL  Attn:RR  Quote
03-23-2017 10:44 PM  20 months agoPost 14
Heli_Splatter

rrElite Veteran

USA

My Posts: All  Forum  Topic

I don't see how using these adapters is so difficult to do. They do not add much weight and they don't take a lot of space. They do allow you to choose how you want to combine batteries. I have never missed a beat using them in planes or helicopters. Other connector styles could be used.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-24-2017 12:53 AM  20 months agoPost 15
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

My Posts: All  Forum  Topic

I did this a little in the beginning ('05 or so).

For pod/boom helis above 450 class it's just not practical at the high C discharge rates demanded. you really have to match the cell IRs to get a pack that will last longer than 5-10 cycles. If you just grab two spare packs of different ages you don't know what you're going to end up with.

For example, if you have a 3s pack with 1.2, 1.2, 1.3 and another pack with 4.2, 4.3, 4.4 IRs the higher resistance of the older pack will cause undue stress on the lower resistance, better pack. What you'll end up doing is dragging the whole pack down to the lowest common denominator; and because you're hurting the packs in doing so, you'll end up with an even lower overall IR than the worst pack you started with (by the time the IRs even out--if they do at all--you'll likely end up with average cell IR in the 6s in just a few cycles.

Ask me how I know.

If you want a case study, go back and look at some of the marketing material from Align when the trex 500 was first released. They suggested that you could use 2 of the same 3s 2200 packs you were using on your 450 in series to power a 6s 2200mah 500. Then, go back and look at some of the posts about how quickly the packs were dying, and how it looked good on paper but didn't hold up in the air. That whole marketing point was quickly dropped, as it simply didn't work.

I'll admit, its good to know these things: knowing how to solder in a cell is useful; I still will try to replace a bad cell when one goes south if I have a spare because 5 more flights is better than ash canning the whole pack. And, unless you're just sitting on a bunch of packs that you'd otherwise just throw away, I suppose a few more flights is better than none. But, as a long-term strategy for packs, mixing and matching cell IRs is not good. At best you're just going to get a weekend or two more before theyre done.

if it ain't broke, break it.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-24-2017 01:03 AM  20 months agoPost 16
Heli_Splatter

rrElite Veteran

USA

My Posts: All  Forum  Topic

If that is the case... how do you explain all the guys flying 12s using 2ea 6s 5000 packs on their 700 and 800 sized helicopters?

PM  EMAIL  GALLERY  Attn:RR  Quote
03-24-2017 01:13 AM  20 months agoPost 17
EEngineer

rrProfessor

TX

My Posts: All  Forum  Topic

Perhaps the packs were purchased at the same time.

So they are matched with regards to IR.

Do you think people are going to trust crappy old batts. in their $2000+ helis?

FWIW

Logo 600SXs, 800XX, TDR IIs

PM  EMAIL  Attn:RR  Quote
03-24-2017 02:08 AM  20 months agoPost 18
ICUR1-2

rrElite Veteran

Ottawa, Ontario

My Posts: All  Forum  Topic

how do you explain all the guys flying 12s using 2ea 6s 5000 packs on their 700 and 800 sized helicopters?
I'm not 100% sure but if I were making a 12s for a 700 I would buy 2 new 6S hoping they matched closely

spending time, paying attention

PM  EMAIL  GALLERY  Attn:RR  Quote
03-24-2017 04:06 AM  20 months agoPost 19
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

My Posts: All  Forum  Topic

^ ya. That. You buy new matched packs and you don't split them.

To further the point, if you crash and damage one of the 6s packs you may as well use the other good one for something else. You can't just buy a replacement 6s pack for the old one. The whole set will have severely reduced lifespan.

if it ain't broke, break it.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-24-2017 04:26 PM  20 months agoPost 20
Heli_Splatter

rrElite Veteran

USA

My Posts: All  Forum  Topic

Well, I have done it both ways. If I have one battery go bad and the other has a reasonable IR, I will buy a replacement.

Generally, I fly two packs purchased at the same time that are exactly the same. I have not ever tested new packs for matching IRS before flying them together. I don't think the issue is as important as some seem to think.

Throwing away a $200 battery is tough. 800 size helicopter but I fly 12s on a 55cc equiv Yak plane too. Many years there.

This is my experience over 10+ years of flying and I have flown many smaller packs without worrying about matching.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 920 views POST REPLY
HomeAircraftHelicopterHelicopter Main Discussion › How to make a 6 cell battery from 2 x 3 cells
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Monday, November 19 - 2:45 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online