Linc,
Package shipped to you,you should see it in a week or so.
I sent along some extras for all the good work you've been doing.
thanks in advance

hey linc, you think you could resolder this?
the tab broke off in my neuenergy pack. only a small portion of tab remains.
http://i183.photobucket.com/albums/x...n/GEDC0172.jpg
http://i183.photobucket.com/albums/x...n/GEDC0173.jpg
http://i183.photobucket.com/albums/x...n/GEDC0174.jpg

Couldn't you just peel away the wrapping around the tab, and solder a new tab onto it, Linc?

Dunno, might explode in your face, but could that work... Theoretically?

I have fixed similar issues with broken tabs, so I guess I could do it again.

Hey Linc,
I see my batt's arrived safe.
Let me know when figure something on the ThunderPower packs.
Thanks man.

No prob. I will get to them tomorrow for the repairs, the a/c in the hobby room crapped out so I have to fix that first. It was 110f up there today, no fun sweating and trying to fix lipos!

What are the specs on the tp packs, in case I have to charge them, and for my general knowledge. They look like 25c packs, but what mah are they?

I always sweat workin' on LiPo's, there's alotta juice in those Bad Boys.
That's why I sent em' to you

where did you get your avatar? that was exactly the layout we ran at our track last year

Yeah, I arc a few packs here and there, can't be afraid of a few sparks now and then!

What mah are the tp packs? Sorry to keep asking, but the labels have velcro over them. And I do not want to overcharge them.

I'm pretty sure they are 3800's. I got them with a heli I bought but not 100% on that.
Maybe try to peel that velcro back if you can.

Already did, the sticker goes with it. If they are anything close to that they are 3700 packs. I will try them out in the slayer, as that is setup for 5s and will not push that size pack too hard.

Saw it online somewhere lookin' for track ideas.
I'm going to do a similar layout in a 65'x100' area with concrete pathways all around and throughout so I can recover my cars from my wheelchair.

Ahh, I see what the "gimpy" refers to... I give you alot of credit for having a sense of humor, not sure if I would be able to handle that myself. Respect! (said in Ali G voice)

Sounds about right.
The Zippy's should be 4200's Maybe give them the same test. I can't remember what I pulled out of those. I think I might have to many batteries if I can't remember what's what.

I have so many lipos I cannot really remember where they all came from... So I feel your pain. I will try to get them all labeled correctly!

Always read the forums but never posted...

Anyways,

I have a 3s 4900 20C Rhino battery and when I charge it it only takes in about 1500 -1700 mah after I ran. I charged the lipo up again and ran it to about 11 volts where it started to slow down. The second time I charged it was on a hyperion that I borrowed to check the cells. It was fully balanced at the end of the charge. I ran it this time and it did the same thing. I was told to charge the individual cells and the mah added up to around 4500 but I did not run until cutoff and it only charged to around 1500-1700 mah again.

What a mouthful, but do any of you guys know what is going on?

Thanks,
Zach

Hmm, sounds like you have a bad cell on that rhino pack. Can you set your lvc to 3.2v per cell and give the pack a full run till the lvc kicks in? If the charger only puts back 1700mah that is all you have used, not even half of the pack...

I did not mention that but it has always been set to 3.3 volts per cell. I ran it to cutoff the run before it only charged this much.

When I charged it it does not even start charging at 4.9 amps like my other batteries do. It starts at about 4.2

You must have a bad cell. It is dropping voltage badly, and letting the pack voltage get low enough so that the lvc kicks. I can pull the bad cell out, or at least test the pack, but it may be cheaper/easier to just buy another pack, those packs are about 40 bucks new...

I have a neu energy pack that should be here tomorrow but I was just seeing what could be wrong. I figured it might have had a bad cell. I have only had it since january and have only charged it about five times a week sometimes not using it some weeks.

Eh, I've got an awesome wife,7 month old twins(Grrr. go back to bed) 2 Good Dobies(kinda) and I still get to play with toys at my age.

Lifes to short to dwell on the speedbumps, you gotta keep on truckin'

Good way to look at it! Glad to hear you have a great family, that can cure all ills!

hey linc i got that 5s zippy 5000 pack h pack u fixed for me but my application in the muggy is too much for it and i puffed a cell pretty good it goes away but after i charge it and run it i comes right back and the pack is running hot, but i have a 10th scale staduim truck i was wondering what it would cost just to split the pack into 2 2s packs as im going to need a good pack for the muggy which has been almost bombproof on 5s but am looking to get a 1900kv motor rather than the 2200 and run 6s for less strain on the system

Linc,
your pretty good with soldering..(duh:)) and i was wondering if you knew how they made these...and if it could be done with the existing male/female plugs i have.....

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXNKY8

I have made those before. Just tin all of the tabs, and figure some method to hold all 3 of the plugs together when you solder them up. Pretty easy.

do you use plasti-dip to insulate the joints as well???

I made some adaptors similar to that and I just use hotglue to insulate them. Doesn't look the best, but works well. If it can't be fixed with duct-tape, then hotglue is the next best thing. :smile:

Yep, as long as it insulated and doesnt allow shorting out, then it doesnt matter how ugly it is.

+1 on hotglue. I used epoxy for the first deans parallel adapter and it was a bitch to keep it where I wanted it to stay, kept running out. I like hot glue for various projects, especially sticking wheel weights on, works like a champ for that.

shoe goo for the win!

just got the james power pack, thanks man, looks real good. i might buy from you again! lol

Closing up Shop!
 

Ok guys, sorry to have to do this but I am thru with lipo work.

Sitting at work today trying to get solder to stick to the end of an a123 cell and it hit me that this is a complete waste of my time. I have too much going on and just do not have the desire to fix lipos anymore.

It did not help that half of the people who sent me packs made it next to impossible for me to figure out who they were and what they wanted done to the packs, plus 500 pm's per pack is getting a little old too.

I have plenty of other stuff to keep myself busy, and it is way too hot to be laboring over a soldering iron for hours at a time.

Anyways, most of the packs I am fixing are zippy packs, and the build quality is all over the place. My advise is to buy better packs, or more than 1 zippy pack at a time and just throw away the problem packs.

I will finish what I have here, and will not be accepting anymore lipos. If you do send them to me I will not be fixing them...

Also I would just like to say that A123 cells SUCK. They are worse than nimh cells. Nothing sticks to damn weird al ends, the "resistance welded" metal tabs are not attached worth a crap either, so no chance soldering to them, as they fall off if you look at them funny. Plus they are difficult to package on a car, and are very heavy.

Sure they can handle abuse, but only an idiot abuses his batteries... Plus they don't hold voltage worth a crap either. Good rx batts if you lack the intelligence to run a ubec, or, god forbid, still like nitro.

End of rant, the a123 cells have just pissed me past off.

UhhOhh... I'm guessin' those are my A123's pissin' you off.

I hope I wasn't one of those who got you mixxed up over whats wrong with the batt's,I thought I sent pretty good instructions.

Anyways Linc, don't worry about the Thunder Power packs. You can toss em' or use if you want.
Hopefully you can make it through the A123's and Zippy's with throwing anything through the window.

Take it easy and good luck!

LINC!

BIG THANK YOU:yipi:

for ALL You've done for us here at RCM :smile:

You Made a Great Run at it :intello:

And helped a lot of people out :angel:

Saved us thousands of dollars :rules:

We couldn't ask more out of you. :yes:

Good luck with your other things! :mdr:

Everyone here at RCM appreciate all you did with lipos :yes:

Now go have a beer and enjoy yourself! :party::wink:

yeah your a123 cells are pissing me off. I have broken a hammer now, and my bench vice, when I get pissed it is not nice for anything I can get my hands on. You a123 cells are in a pile, I may finish them, or I may not. To be honest they are crap, and I would not contemplate using something this shitty in any of my rc vehicles. I have no idea how well the soldering will hold, but my worst soldering is 80 times better than the crap resistance welds they had stock.

Thanks for the kind words ML. Some sort of horse tranquilizer would be necessary to calm me down right now... I bet I am steaming from the ears...

To everyone else that has lipos here, the a/c in my work room is out, and I do not feel like trying to fix lipos while sweating. It is 110 in the room, and I have no desire to do anything in there.

I have a feeling it is time to take a break from rc. If something pisses me off this much it is not close to being enjoyable and I should stop.

Geez these guys make it look so easy.
http://www.youtube.com/watch?v=vZpYq...om=PL&index=46

Sorry for gettin you into this man.
If you don't want to finish them I'll understand. Just ship em' back I'll figure something out.

yeah, it does look easy, I wonder what type of flux and solder he is using...

I have made dozens of nimh packs, and am not new to the process by any means. I guess I will give it another try, but plan to have some a/c running by then. 110 degrees and my concentration do not go well together.

Apparently the cells ends have a coating on them that allows regular 60/40 to stick so you just want to scuff them with the Scotchbrit pads and not hit them with a dremel like you might with Ni-xx cells.
On a quick search I found this for flux.
https://www.tanicpacks.com/product_i...de75ebffe1db49
if you want to order some up just bill me for it and your welcome to whatever is left.

I've used regular 60/40 Rosin Core Solder on all kinds of cylindrical cells.

I use the Rosin Core .032 diameter that Radio Shack sells.

A good scuffing really helps things hold and the solder flow. It does take a really hot soldering iron though. A small iron won't work.

Just an update Linc.

I appreciate your advice. I received the Zinc Core Solder and flux, and successfully built 2 - 4S Flightpower 3700mah 25C Packs from the one huge 8S pack.

Just ran them in the Revo yesterday and am very happy. Got a great deal that time.