De-Soldering Promatch Battery Packs

[godale03]

Hey Guys,

I have two 7 cell packs from ProMatch Racing. I ordered them pre-made. I have an E-Revo that in order to get these packs to work, I need to lengthen the cables on the both packs so that I don't have to hack up the battery doors. I have been told that if I try to unsolder the two wires from the battery tabs that it will not work. I was told that ProMatch uses some form of cold soldering that I will not be able to get the solder joints hot enough to undo, and thus will not be able to solder on new ones. Has anybody heard of this, or does anyone have a better way to lengthen the battery wires? Thanks

Tom

 

[Lessen]

It is true that there form of soldering may be too tough to undo. I've seen that before. It basically looks like a very small spot weld or a couple very small spot welds. At any rate, you'll be hard pressed to remove it. Now I've only seen that on battery tabs.. not the actual cell to wire connection. You won't know until you try though. Can I get a pic yO?

 

[godale03]

Here are a couple of pics... I hope you can see them ok.

Tom

 

[Lessen]

You should be able to get those wires off of the tabs. I've never heard of anybody putting the wires on so well that you couldn't remove them. Now tabs maybe, but not the wires. Give it a go.

 

[robmob]

Can you show me a pic of where the tab is welded to the cell.

 

[godale03]

Here you go my freind.

Tom

 

[Lessen]

Yep, just as I suspected. Those little dots are like mini spot welds. The only way your gettin those tabs off is if you grind them off. You should be able to get the lead off of the end tab though if that's all you're lookin to do. If you were thinking of rearranging the pack... we'll I dunno bro. I'd just buy differrent packs. The last time I came across "soldered" tabs like that was on 2/3A cells and even those thin tabs didn't want to come off. I literally ripped them off of the cells and it still left the metal of those little dots.

 

[godale03]

Yep, just as I suspected. Those little dots are like mini spot welds. The only way your gettin those tabs off is if you grind them off. You should be able to get the lead off of the end tab though if that's all you're lookin to do. If you were thinking of rearranging the pack... we'll I dunno bro. I'd just buy differrent packs. The last time I came across "soldered" tabs like that was on 2/3A cells and even those thin tabs didn't want to come off. I literally ripped them off of the cells and it still left the metal of those little dots.

Yep, yep, all I want to do is remove the existing wires and then re-solder some longer wires on.

 

[abadk9420]

Like lesson said you should not have any trouble getting the battery leads off of the tabs as long as you have a quality soldering iron, my Duratrax packs were the same way and I used my 40 watt iron to unsolder the leads from my battery, once you get them off just make new leads the length that you need and solder them back on, if you need to you could always cut the tabs back and solder your lead onto the sides of the battery so that the wires are not coming off of the top of the battery and are out of the way when you slide them into the battery compartments.

 

[robmob]

I would remove the tabs the wires attach to from the pack and solder the new wire ends directly to the pack.

See that pic I posted for you of my pack in the EREVO battery bay.

The solder joints on that pack look no different than the ones I do myself. They should easily come off. Make sure use a wide tip with your soldering iron turned all the way up.

 

[godale03]

Hey Guys,

I was not able to get the battery tabs off with my Weller. I just don't think I got it hot enough... and I didn't want to leave the iron on that cell long. I was however able to get the wires off of the tabs. So I just added longer wires and new deans. It is a tight fit, but it fits and I didn't have to hack any part of the battery box. I just ordered a Hakko 936 so hopefully that will do it.

 

[robmob]

The Hakko will do it. That is what I use.

 

[godale03]

The Hakko will do it. That is what I use.

I should have spent the money and bought the Hakko from the start. I cheaped out and bought the Weller... which is not a bad setup... it just doesn't get hot enough.

 

[robmob]

I had a Weller as well. It got trashed as soon as I used the Hakko once.

 

[godale03]

I had a Weller as well. It got trashed as soon as I used the Hakko once.

Well I am excited to get the chance. XRC had an advertisement in this months mag.... Hakko 936 79.99 free shippiing with the flame decals.... tough to beat, so I went ahead and ordered one. Hope the wife is not too pissed! LOL I think I will either give the weller to my father, or I can throw it in my pit box and take it to the track.

Tom

 

[abadk9420]

Hope the wife is not too pissed! LOL I think I will either give the weller to my father

Tom

Or you could give it to the wifes father and then maybe she wouldn't be so pissed,LOL!!!

I need to get me a better iron my self

 

[godale03]

Right! LOL