Hello i Currently own a 10s5p battery and the stormcore 60d vesc… im wondering if i buy the same battery am I able to hook both in parrellel up to the stormcore 60d?
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How would that matter if they were paralleled?
As long as the packs get charged seperately and are at the same voltage when they’re connected, I don’t see how the age of the packs matters at all.
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I agree with that. As long as each pack is evenly worn, it shouldn’t be an issue.
Edit: I mean as long as you didn’t have half old and half new cells in either individual pack. Not health comparing pack to pack.
I really don’t get why this even matters. They’re still two seperate packs. Once they are joined in parallel, they basically become one pack and the age/wear of either pack shouldn’t matter as long as the overall power drawn from the packs could be sustained by the weakest pack on it’s own.
Charge each pack seperately and i can’t see an issue.
If the cells were being mixed together to create ONE pack in a permanent configuration, I can see the issue. But as seperate packs I don’t think there’s a lot of cause for concern.
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Being evenly worn matters when cells are in series. In parallel I’m not sure it matters much in this use case.
No im saying that it’s fine as long as both packs are worn evenly. As in half the pack isn’t old cells and half is new. Sorry I worded it a bit ambiguously.
Yes, each pack needs to be built safely by itself. I agree.
What you’re saying is still ambiguous, I don’t understand what you’re trying to say.
I assume he is talking about cell degradation.
Capacity loss over time, internal resistance going up etc.
Sure, but how does that matter when joining 2 seperate packs in parallel?
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One pack having severe less capacity than the other one, leading to one pack dumping energy into the other?
I’m saying that each pack isn’t unevenly worn in itself. I’m saying that differences in health comparing both packs doesn’t matter as much. What I AM saying is if in one pack the 2nd p-group is in perfect health and the third group is in terrible health, it would not be recommended that you use the pack for this or any purpose.
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As long as the packs are at the same voltage when they are connected, there shouldn’t be any dumping of energy.
When you connect a 1ah pack and a 100ah pack in parallel at the same voltage, you get a 101ah pack. No dumping. If you connected a 3v 1ah pack into a 4.2v 100ah pack you might be in trouble tho 
What’s generally accepted as the voltage difference? I’ve heard <.1 volts is fine but idk if that’s true.
It doesn’t matter much actually. What’s gonna end up happening is the older pack (with higher IR) is gonna have less current drained from it than the new one in use. (Think of parallel resistors with slightly differing resistors) The new one is gonna wear faster till they’re even. They can even be charged together, it doesn’t make much of a difference. It can get tricky when you have cells out of balanced, so when someone asks the question, I assume they don’t have the knowledge or BMS type to make sure everything is healthy.
Hard disagree. If the packs are wired to bypass discharge like most esk8 packs, then you’re losing all charging protection on at least one of the packs when charging in parallel.
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It’s subjective. As close as possible is recommended.
The margin of ‘what is safe’ would fluctuate greatly depending on all sorts of variables.
Ah yeah I should’ve been more clear. You can charge them together, you just have to separate the discharge connectors.
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That’s really not clear.