Not sure if this belongs here.
Figure I would share.
I finally got around to making my backup battery pack a 10s4p.
My main pack is a 10s5p.
I wanted to keep it simple and compact, so I made it to where I could hot swap it by running my Unity plug and main battery plug outside my enclosure.
The battery sits on the back with Velcro and a strap.
I carry the spare in my pack till I need it and just strap it to my board. Plug and play and away I go.
I built the battery so I can remove my D140 BMS by installing a xt30 for the charge port and B- and not worry about carrying it with me.
Here are some pics.
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very clean execution!
I’ve been wanting to do something like this on my small campus board- with only a 12s2p and hummie hubz, I don’t get very much range, but also don’t want to go with anything bigger to keep it light. My 28" Arbor Rally is absolutely the perfect size.
Mellow made a hot swap battery system on their powertrain years ago that looked pretty interesting, but I’d need to DIY something waterproof to handle Florida afternoon showers.
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The hard part would be to waterproof.
And even then you would need some ventilation to prevent condensation from building up.
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I’d take an extra male xt connector, fill it full of epoxy/silicone, and use that as a cap for the unused battery pack. One bad splash of water and battery goes pop.
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Good point I have some 3d printed caps that I used to use on my Fpv quad batteries.
Now if I can find them.
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Plus i would find or print a very tight fitting box for the battery to slide in so the overhanging cells don’t bounce up and down.
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It doesn’t bounce around that much after last weekend’s ride in SF it was well tested.
And I’m keeping it compact so it’s easier to carry.
I could say I’m a minimalist I don’t like to carry too much stuff.