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Relatedly, here's a 2012 video of Jamie Hyneman talking about creating an electric outboard for Mythbusters for quiet operation while filming: https://www.youtube.com/watch?v=_EV2qq2-Lck

Pure makes a lot of the same claims about noise and performance. They seem to have upped the appearance though.

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Before we did this outboard, I watched the Jamie Hyneman video you referenced. Because he doesn't use active thermal management of the cells, I would expect the cycle life to be ~ 300 rather than the 1500 we expect with this one. Since battery depreciation totals about 4-5X as much as electricity usage over the life of the system, not doing thermal management multiplies the cost of an outing by about 5X. The Hyneman system would effectively pollute more than gas outboards, because of how quickly the batteries would be consumed.

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