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Bad news!
A higher rate of discharge will male the batteries even more dangerous than they already are.
There is no legitimate basis for this quest in the first place. We have extremely clean air just about everywhere, and an inexhaustible supply of fuels.
Send the enviro-loons straight to hell!
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They should stick to playing with batteries in the lab. No understanding of aviation. I would want to see the kWh/lb and kWh/liter numbers along with the C rate. Doesn’t sound like they are close.