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That deserves a thread 
Just FIY, discourse might prevent you from posting comments or other things at the beginning. Theres a certain threshold for new users on how much they can post in a certain timeframe. Just so you’re aware.
Make sure to read this and apply accordingly. 
(rules apply for used parts, just a different subcategory)
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Based on this comment I’m guessing he found this pic on some group, but it’s not his pack
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Missed that part, thanks.
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Thanks
It still has some utility in preventing overcharge/overdischarge and thermal monitoring (assuming temp sensors are installed), but yeah, I hate seeing batteries without balancing. It’s fairly common on power tool batteries where cost and size are driving factors, and a non-balancing BMS can be smaller and cheaper due to the reduced component count.
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this and balancing is like the very minimum function that needs to have, or else what’s the point of even having it
longevity isn’t their main goal, so they will cut corner on those, but an esk8?
cheaper maybe, but not smaller if their brain get stuck with a discharge bms
…Why do we use shaft keys instead of machining it into the pulleys themselves?
It’s much more difficult to machine
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I figured, but it just feels… antiquated?
I bet i could turn a d shaft pulley into a key shaft pulley without too much difficulty, though.
Something something costs at production level.
Something something economy of scale
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Upon further thought; also, id rather replace a broken key than a broken pinion.
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Good luck finding a broach that shape, and then holding it in the correct place while you ram it through.
The keyways are much easier to machine.
If it annoys you that much, epoxy a key into your pulley 
(That would be incompatible with a lot of motor shafts though)
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Oh, i got no problem with it, i just had an idea that i was sure had been had a thousand times before; which makes it a noob question.
That said, one day, i will need to fit a d shaft pinion onto a key shaft, and on that day i will reach through the timestream and high five the hand present me just raised.
In you guy’s experience, is it better to have too much or too little backlash on plastic gears?
Neither, but if you must choose, too close.
Whats important is how close to perfect it is. With too much distance between, youll wear out the tips of the teeth faster. That is not good. With too little, everythings under increased pressure, which id think would make it easier to break said gear, but should wear relatively even.
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Nothing a grinder and some more epoxy can’t fix
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truth
Hi,
I want to know how to embed ILI9341 LCD driver in davega-v0.4 code
(instead of 9225) on arduino nano.
Or if someone has already done it and can make a backup … 
Thankz