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Topic starter
Hello
I got this battery, but I want to know why does it have two black and red cables.
Are they both positive and negative?
Posted : 27/03/2023 3:05 am
Definitely test with a multimeter but it's likely that the two red wires are just to carry extra current - ie they're both positive.
Posted : 27/03/2023 10:31 am
marcdraco reacted
It's actually possible they go to different cells - in this way you can get more current (less internal resistance) by paralleling them up or greater voltage by putting them in series; or even split supplies (+ and -).
You can determine this (as Matt says) with a meter but test for continuity between the red pair and the black pair (but not a red and a black because that might make magic smoke come out of your meter).
Take everything I say with a pinch of salt, I might be wrong and it's a very *expensive* way to learn!
Posted : 30/03/2023 3:30 pm
Topic starter
@marcdraco yes I've tested and both red wires are positive and both black being negative. Thank you all!
Luckily there's no smoke yet...
Posted : 31/03/2023 2:21 am
marcdraco reacted
That is the standard colour code - even the Chinese use that thankfully! 🙂
What I meant was are the two banks of cells isolated so you can get 7.4V at low current or 3.7 at a much higher current or + and - 3.7V.
Doesn't matter, I'm just curios as I've not seen on like that before.
No magic smoke is good. I did that to my ex wife's Karcher window vac while replacing the LiPo and hit the wrong pair (damn careless of me, no excuse) and I think the Genie hid behind the smokescreen while the neighbour called the fire brigade.
Still works though.
Take everything I say with a pinch of salt, I might be wrong and it's a very *expensive* way to learn!
Posted : 31/03/2023 5:08 pm