It will connect BETWEEN the positive terminal of one P-group and the negative terminal of another P-group. All the metal parts connected to the nickel tab are BETWEEN the positive and the negative. It doesn’t matter where exactly you solder the balance wire.
Okay, so if I understood your reply correctly I can leave it like it is?
Yeah looks good. Positive of one, between the two, or negative of the next, all are pretty much doing the same thing.
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absolutely
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Especially for high powered cells I hate to use nickel for the power lines. Looking at the build, it’s probably around 30A/cell, right? All my A123 packs (2p) are all copper soldered to the cells. I always stare and stare at the piles of nickel strip (including .25 and .30 nickel) and spot welders, then I reach for copper braid instead… This is not as bad as you might think. I think in a lot of other RC hobbies, it’s typical to solder to cells for high power applications. But then again, with all the testimonials on the forums, I’m probably way overthinking/overbuilding things.
If you’re considering spanning groups with nickel, it’s actually quite similar to doing a fold-over, right?
The 20awg experiment looks interesting! Can’t think why this would be bad, except for the tedium of making 144 or so solder joints. 
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Check my recent thread… I used braid copper soldered to nickel then spot welded that on… Just a diff idea…
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can i use this on a 12s6p?
thx …i’m a total noob still…
It´s a 12s 4A charger. you can use it on any 12s pack. Ok 1p will be hard on the limit depending which cells you use… 
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@Andy87 You managed out of all the chargers to link specifically my charger from the exact same seller 
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was first i found on Ali… might be a sighn… who knows 
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How much is acceptable cell voltage difference? I noticed some being 3.517 while others were more like 3.524. This is before charging and with 0 cycles.
I didnt think about it then, but I am a bit concearned now.
As long as it doesn’t exceed 0.1V you don’t need to worry too much.
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I think I’ll do that. It will be good for science. 
It’s “only” 96 solder joins since I this would only be done for making the 3S2P packs, which I can then easily connect together with 10 AWG wires soldered between the cells at the front and back part of the battery pack.
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Guess I can contribute now. Just finished my first pack for the evolve gtx. Still awaiting crimps for the balance plug but hopefully take it for a spin tomorrow
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First 3S2P group done. Three more to go. Stats so far:
- wires cut: 12
- pieces of insulation stripped: 24
- solder joins made: 24
- shorts across the solder wire that made a splendid spark: 1
Flex test:
Note the middle corridor for routing the balance leads. Patent pending.
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They’re so pretty!
