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"We have reported EVs with dead 12V batteries quite often. They are a known issue with the Nissan Leaf, some Teslas, and even with the Polestar 2 more recently. That may make you wonder: why? Nikki Gordon-Bloomfield, from Transport Evolved, explained that in another video that is worth watching." :)

 

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Yep, gotta have that secondary power source functioning apart from the traction battery. All sorts of craziness ensues when it's dead or not at the right voltage and you'll be dead in the water just like an ICE. I've experienced the issue first-hand with a LEAF that had to be towed.
 

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One thing most don’t get is that cars don’t like to sit.
Gas or electric.
I found out the craziness that these cars do when the battery goes dead or gets weak on day one with mine(cluster on with key etc)
My rx8 will pull its battery down if it sits for at the most two weeks before starting(I got the hum from Verizon so I get notifications when it gets low)
 
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