Is there any cheaper balance chargers for 12s than the one you bought? And what port is best for the balancing?
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My thinking is somewhat like Mr. Tetra. Something onboard that maybe gives a green-yellow-red on cell voltages, and a multipin port to balance periodically or when indicated.
There are many many different plugs you can use. Gx16 or gx20 are pretty widely available.
As for the balance chargers, i really don’t know. I had a bit of a look around the other night and finding products and product reviews was a little bit harder than I’d anticipated. So i just bought the one that I had used.
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If I have (2) battery packs, 1, 12s3p the other 12s2p combined in parallel to make 12s5p. Can I have a smart in both and get a 12s5p reading?
If you are using 2 BMSs you’d get 2 readings…you can combine them permanently and use 1 but that’s a lot of work
There’s a few listed there. I think Graupner also makes one. None are cheap.
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hmmmm
80€ shipping 
The one from @glyphiks you can get for $250 US + round about 50$ shipping directly from Ultra Power.
The good thing on the one you linked, you can charge 1-12s (or as min it looks like) the Ultra charger can do only 6-12s.
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Anyone know anything about these?
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I was guessing they were A123 Cells, @PrivacyDoctor pointed out they are a shit deal compared to the 12S4P packs from batteryhookup.
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Need a power supply, but this is an interesting option. That balance current is psweet.
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But these are lions right? I thought a123s are lifes?
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12v nominal so I was thinking they were 4S2P life
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FWIW Stanley has some nice planes at good prices but I am sure you already know that 
https://www.stanleytools.com/products/hand-tools/cutting-tools/planers
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It is a bit pricey for a BMS, but it would make an excellent balance Charger IMO!
It’s kind of funny. Lie-Nielsen cloned the best of the old stanley hand planes for big bucks and built a very successful business. And their clones are getting cloned by the Chinese, and good quality versiones are sold by Woodcraft and Rockler.
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Tesa 61395
or
Tesa 4965
Also, at seams like you’ve pictured, a very light running of superglue across the seam can work well.
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Will try that, in the end I will have a layer of duct tape running over them that should hold
I have never seen a tighter fit…the long sides are bulging and the lid can barely close. Not sure how to panel mount a XT90 and XT60 to this…
Packing tape loop on the 4p block so I can actually remove it from the box, otherwise they stuck
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