decided to take a 4.5A, which plug should I take (a gx12 with a cover or a 5.5x2.1 with a cover) Or which one do you recommend?
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Depends on what chargeport you plan on using but 2.1x5.5 is the most common
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You should pick a plug that has a current rating higher than the maximum current you intend to charge at.
Other than that, itās a matter of preference. My last board used an XLR. Brian swears by 5.5mm barrel jacks. My ebike uses an SD16 because why not. All are valid choices, but they also all have their pros and cons.
So I was wondering since I saw this 5.5x2.1 that handles 5a but says 30v so I donāt know if itās a problem?
The voltage ratings of connectors are usually pretty conservative, especially since we arenāt exactly doing aerospace work here. The current ratings, however, are much more significant. Do Not underrate your connectors current-wise.
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is there a way to split the balance plug of a 12s jst into 2 6s jstās, and balance the whole pack with one of these?
I have a p group out of wack Iām trying to figure out how to raise. Whatās the most common way you guys are doing this?
Charge a single p-group through the balance leads.
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I think youād need a pair of center taps to the pack too, but otherwise, it seems like a reasonable thing to do.
ā¦Actually, itād probably be cleaner to just make 2x 6s packs since youād need to use a y connector in either case if going with XT** connectors.
If youāre using bullets, the center taps make a bit more sense since you donāt have to physically break apart the Batt+ and Batt- connector
but yeah, for a single p group, itās a few hours on a 1s charger for me
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how do I do this/what do I need? This is a TB 12s4p battery thatās got multiple groups out of whack
You can get a balancing board off eBay or something, I personally use a 4 bay charger from Amazon
Use some alligator clips and make sure the settings are right
You can only do one at a time though or it will short out (all bays have a common positive)
Iām confusedāwhat are you doing, taking apart the whole battery and disassembling the p-group to charge each cell individually in a 4 bay charger?? Isnāt there a way to do it just through the balance plug?
Get some break out board wires, stick them into the balance connector to isolate the bad group, and attach the other end to a single bay of the charger using alligator clips
You donāt need to pull the battery apart, just unplug the BMS balance port
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oh jeez, I gotta do some reading I donāt even know what ābreak out board wiriesā are =/
The wires with male connectors on each end from Arduino kits
SIM&NAT 8inch / 20cm Male to Female Dupont Wire, Male to Male, Female to Female Breadboard Jumper Wire Ribbon Cables kit for Arduino Raspberry Pi 2/3 (90 PCS) https://www.amazon.com/dp/B07RX78T9L/ref=cm_sw_r_cp_api_i_QLm9EbXYNYVW7
O god, dude do I need to know how Arduinos work and shit and how to use them to do this? Because Iām not a robotics engineer 
sorry, is this the only way??
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One second, Iāll show you
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This is possible, but you must either sever the series connection between the two packs, or have two separate hobby chargers that do not share a ground. Otherwise, POOF!
You can just poke a wire into the balance connector and run 4.2v to the low p group until itās even with the others. (pic coming, its on my phone)
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