What is drawing so much power? a computer fan in the battery box would draw a watt or two, anti-theft device would draw a few watts as well, speed controller staying powered up shouldn't draw more then 5 watts, seems like a keyless entry wouldn't even draw that much, seeing as how they do just fine in gasoline vehicles with much smaller batteries! and a keyless entry would be ideal for powering up any systems that need to turn on before you drive off, same as how some Diesel vehicles turn on the glow plugs when you get in and sit down, before you even put the key in.
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