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-   -   Lipo repair (https://www.rc-monster.com/forum/showthread.php?t=16241)

redshift 01.20.2009 04:24 PM
"This is all a waste of time IMO"

Exactly. Why overcomplicate things?

Are these the only MA packs like that, or are the 4S packs actually 8 cell?

lincpimp 01.20.2009 04:34 PM
Quote:
Originally Posted by redshift (Post 254097)
"This is all a waste of time IMO"

Exactly. Why overcomplicate things?

Are these the only MA packs like that, or are the 4S packs actually 8 cell?
All of the 6000 and 8000 packs are 2p, made up of 3000 and 4000 cells, respectively.

So a 4s pack in either will have 8 cells.

Maxamps only do this cause they want some big mah numbers, and nothing they have save for the 8000 cells will run a MT in a 4s config. Their 5000 cells are worthless, my 5s 3700 poly rc 25c pack had way more punch and about the same runtime as a maxamps 5000 20c 5s pack... That was in a revo with the mech 2 speed and mech brakes with a 1512 2000kv motor geared for low 40mph range.

redshift 01.20.2009 04:43 PM
What a joke... no wonder they don't use clear shrink.

I know you're busy- and thanks for the info!

lincpimp 01.20.2009 05:06 PM
Quote:
Originally Posted by redshift (Post 254102)
What a joke... no wonder they don't use clear shrink.

I know you're busy- and thanks for the info!
No prob, I have a pair of neu 5000 4s pack that I have to break up into 4 2s packs. I will post some pics of that process too. And some finished products so that people can see the end result.

lincpimp 01.20.2009 08:55 PM
Here are a few pics of a 4s pack that I broke down into 2 2s packs. Pretty straight forward, just figured you guys might want to see a finished product. I normally use 12 gauge wire and deans plugs, but I can put on any type of plug or wire there is. I prefer hyperion balance taps, but yet again, any style can be put on.

http://i206.photobucket.com/albums/b...p/DSCF2975.jpg

http://i206.photobucket.com/albums/b...p/DSCF2976.jpg

E-Revonut 01.21.2009 12:03 AM
Nice work linc! I'm considering sending you my Neu packs to re-wire. They come with 10ga wire that doesn't bend to well near the pack like needed in my E-REVO. Even after taking a dremel to the wire opening I still cut the insulation on the wire. For now I put the liquid electric tape over the cut, then wrapped with electric tape, and opened up the hole for them to pass through even more. I would also like hyperion taps, not a big fan of the kokam taps.

lincpimp 01.21.2009 12:28 AM
Quote:
Originally Posted by E-Revonut (Post 254246)
Nice work linc! I'm considering sending you my Neu packs to re-wire. They come with 10ga wire that doesn't bend to well near the pack like needed in my E-REVO. Even after taking a dremel to the wire opening I still cut the insulation on the wire. For now I put the liquid electric tape over the cut, then wrapped with electric tape, and opened up the hole for them to pass through even more. I would also like hyperion taps, not a big fan of the kokam taps.
Sounds doable. Do you want 12 gauge wire installed? More flexible...

As for the tap swap that should be straight forward, getting the case open is usually the worst part. At least if you want it to close again!

And if it is anything like the trakpower or losi hardcase lipos, it could do with some extra cushion/packing in the case to stop the cells moving around.

E-Revonut 01.21.2009 12:46 AM
XP 4900mah cells, no hardcase. 1- 3s pack 1- 2s pack I think 12ga is more than adequate on my setup, no crazy gearing, less than 40MPH on 5s. Not worried about the hardcase pack I run in my crt.5

lincpimp 01.21.2009 12:57 AM
Ok, figured that you were cutting plastic with the dremel...

So they are soft case lipos. No prob, as long as you like black shrink wrap on them when I am done. I have the hyperion taps for 2-3s here too. So quick turnaround for ya. Do you need new connectors on the main leads, or can I swap whay is on the 10 gauge wires?

E-Revonut 01.21.2009 01:03 AM
Prolly be sending them in a month, I will obviouslly contact you before doing so! I already have the hyperion taps for them, I was going to do that myself making the connections outside shrink. I will remove the connectors from them before sending and clean them up and put some shrink on the bare wire ends.

lincpimp 01.21.2009 01:05 AM
Ok, just let me know.

rawfuls 01.21.2009 02:34 AM
Lincy, I have to ask, yes, I just called you lincy, but how and where do you dispose of your batteries and lipos?

lincpimp 01.21.2009 10:43 AM
Quote:
Originally Posted by rawfuls (Post 254282)
Lincy, I have to ask, yes, I just called you lincy, but how and where do you dispose of your batteries and lipos?
Funny, I just remove all of the wires from the pack, and leave it on the ground outside till trash day, then throw em in the trash. No need to do anything to them. If they are puffed I do throw them at the ground to pop them...

rawfuls 01.21.2009 07:29 PM
Do they make a fun fire? Or just a quick flame.

I thought you were just supposed to take em to the "recycling" center.....

lincpimp 01.21.2009 07:50 PM
Quote:
Originally Posted by rawfuls (Post 254424)
Do they make a fun fire? Or just a quick flame.

I thought you were just supposed to take em to the "recycling" center.....
Nah, no flame, no noise, nothing. They make a sound like you threw a lipo cell at the ground...

Only way I ever got any smoke was to hook a cell directly to a car battery with jumper cables. Not worth doing it, very boring.

Actually, most recycling produces more pollution than just throwing stuff away...

rawfuls 01.21.2009 08:08 PM
Ah, go figures...

So you just toss em out?

What if something sharp is in the can, and punctures the lipo?

lincpimp 01.21.2009 09:15 PM
Quote:
Originally Posted by rawfuls (Post 254454)
What if something sharp is in the can, and punctures the lipo?
The lipo gets a hole in it. Since you are tossing it out, the hole will most likely not damage the pack more than the reason you are tossing it out for...

Lipo myth is still very prevalent. Worst part about damaging a lipo is that you are out X number of dollars you paid for it. That is why I offer to repair and reconfigure damaged lipos, much cheaper than buying a new one.

rawfuls 01.21.2009 09:29 PM
No no no.
If you were to toss it out, say in your trash.
The lipo gets punctured, and it still... flames up, at least, right?

lincpimp 01.21.2009 10:39 PM
Quote:
Originally Posted by rawfuls (Post 254480)
No no no.
If you were to toss it out, say in your trash.
The lipo gets punctured, and it still... flames up, at least, right?
No it just gets a hole in it, no flame, no fun , just a hole. If you stab a metallic object into the lipo a good ways, it may get hot enough to catch something flamable on fire...

rawfuls 01.21.2009 11:13 PM
So after it puffs, it's useless? Both in fun running it, and killing it?

lincpimp 01.21.2009 11:58 PM
Quote:
Originally Posted by rawfuls (Post 254521)
So after it puffs, it's useless? Both in fun running it, and killing it?
Yeah, once they puff they are done. The internal chemistry in the cell causes the puffing, usually under very high discharge, or a low voltage during discharge. Some of the cells internal turn to gas, so it is damaged internally. I have revived non-puffed cells that discharged to very low voltage slowly, but puffed cells are done.

rawfuls 01.22.2009 12:00 AM
In English...

Nevermind, I got it :P

Interesting..

alangsam 02.08.2009 07:20 AM
i now have the 8400 35C packs and they seem to be doing well
 
Quote:
Originally Posted by kulangflow (Post 252703)
Nope, Austin. He said they have a totally different source and that they are a big improvement in cell quality. While Jason and I are "less than best friends", Austin and I get along pretty well.

Austin had sent me a 25C 8k pack and it was significantly better than the previous "20C" packs. Who knows about the rest of them? I don't see myself putting any money into their lipos anytime soon, but I am hopeful that the new packs are as good as advertised for those who do purchase them.

Here is some info from the actual PM's:
"It is a different source that the new cells are coming from, yes. We actually will be upgrading all the cells to 30C over the next month or so. The 3000s will become 3250 30C cells(with no increase to price by the way). They will be followed by the 5000 cells, then the 4000 cells.

We tested them at 30 and 35C. They get about 2500mah at 35C constant and almost 3000mah at 30C constant with good temps. They are a winner. Its the best 3000 cell we have ever tested by far.

Lets see... at 35C it would last a little over a minute the way I figure it. I am thinking that there will not be many guys running it at even 30C constant for the 2 minute run time.

Bottom line is that voltage under load will be very high and it should not hit cut off under a short high amp load.

-Austin"
Love them or hate them, it's always nice to see improvement.
I puffed one the 25C 8000 packs! however i had the warranty and now have the 35C 8400's. After 5 runs i can tell these are much much better packs. They dont heat up in either my MMM 2200 or MMM 8XL set ups. They also seem to stay in near perfect balance.

auto2 02.08.2009 12:54 PM
i have a 4s 3700 pack with a bad cell. not puffed, feels hard, but one cell wont hold voltage or charge. wanna fix it?

lincpimp 02.08.2009 01:39 PM
Quote:
Originally Posted by auto2 (Post 259920)
i have a 4s 3700 pack with a bad cell. not puffed, feels hard, but one cell wont hold voltage or charge. wanna fix it?
No prob, you can send it to me and i will take a look at it. What kind of pack is it? I will pm you the addy.

ilpufxit 02.14.2009 12:40 AM
Lipo repair feedback
 
I just got my lipos back. I'm impressed, they look like new, they're balanced and ready to use.

I spent under $70 with shipping and the repair, easily worth it when my other option was to junk the packs at over $200 each.:yipi:

lincpimp 02.14.2009 05:12 AM
Quote:
Originally Posted by ilpufxit (Post 261627)
I just got my lipos back. I'm impressed, they look like new, they're balanced and ready to use.

I spent under $70 with shipping and the repair, easily worth it when my other option was to junk the packs at over $200 each.:yipi:
Looks like I got something right....

Jeremy1976 02.17.2009 12:23 PM
Very cool that you do this for the forum here! Just sent you a pm regarding rewiring a pack for me. Jeremy

lincpimp 02.17.2009 02:59 PM
Quote:
Originally Posted by Jeremy1976 (Post 262574)
Very cool that you do this for the forum here! Just sent you a pm regarding rewiring a pack for me. Jeremy
No prob, hate to see people throw away good cells, and money!!!

slimthelineman 02.18.2009 08:33 PM
hey linc ive got a 6s 4000 ma pack that puffed 2 cells, this will be the third time ive had to rebuild this pack(balance tap shorted this time) and i was wondering if you would like to have the four good cells. not wanting a whole lot for them considering the pack cost me around $300. or maybee a trade? any how if anyone wants the 4 good cells pm me.

lincpimp 02.18.2009 09:24 PM
Quote:
Originally Posted by slimthelineman (Post 263022)
hey linc ive got a 6s 4000 ma pack that puffed 2 cells, this will be the third time ive had to rebuild this pack(balance tap shorted this time) and i was wondering if you would like to have the four good cells. not wanting a whole lot for them considering the pack cost me around $300. or maybee a trade? any how if anyone wants the 4 good cells pm me.
Sent you a PM.

lincpimp 02.25.2009 03:22 PM
Insides of a Polyquest 5000 30c 2s hardcase
 
Got a PQ hardcase from a member here to fix the external wiring. I popped it open and look what I found!

http://i206.photobucket.com/albums/b...p/DSCF3086.jpg

Made in china??? I guess that enerland does have some chinese cells in their lineup, or polyquest is not using enerland cells? I thought that polyquest was enerland's in house brand, but I may be wrong. Anyways here are few other pics of the cells. Note that the cells have the pos tab on one and and the neg tab on the other. I have only seen enerland cells having this feature, as all of the other chinese cells I have seen have the tabs next to each other on one end. Zippy-r packs appear to be made of enerland cells too.

http://i206.photobucket.com/albums/b...p/DSCF3087.jpg
http://i206.photobucket.com/albums/b...p/DSCF3088.jpg

Jeremy1976 02.25.2009 04:29 PM
Interesting. So they are Enerland cells? Just made in China?

lincpimp 02.25.2009 04:33 PM
They are the same design as enerland cells, and I have never seen that design used by any other mfg...

Jeremy1976 02.25.2009 04:36 PM
Hmmm, so either they are Enerland or they are bullshitting about the cells in the packs they make... For $130 new for this pack I would hope they are Enerland.

Metallover 02.25.2009 05:30 PM
Just a small off topic question is there a good way to solder to lipo tabs? My soldering iron can't seem to heat it enough to get a really good soldering joint.

kulangflow 02.25.2009 05:42 PM
Quote:
Originally Posted by Metallover (Post 265002)
Just a small off topic question is there a good way to solder to lipo tabs? My soldering iron can't seem to heat it enough to get a really good soldering joint.
If it's an aluminum tab you need to use zinc flux and aluminum solder. If it's a copper tab it should solder really quick and easy with even a weak iron.

jayjay283 02.25.2009 06:10 PM
You are all a bunch of BABIES.... Yes they puff (tard) yes they loose balance (cheapy). Yes you can buy the expensive lipo that doesnt... Thats a fooking FP.. $50 its the same cell zippy FP xp LP some thing with vinal uses, I read there are 12 lipo factories in china and a few in Korea which use China as home land tax stuff. Im sticking with Neu lipos,. they are 30c from CHINA azz---Wholes

Metallover 02.25.2009 06:12 PM
Quote:
Originally Posted by kulangflow (Post 265008)
If it's an aluminum tab you need to use zinc flux and aluminum solder. If it's a copper tab it should solder really quick and easy with even a weak iron.
Wish I'd known that...:sleep: Oh well:lol:

jayjay283 02.25.2009 06:13 PM
yeah man whats up


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