Submitted by Live_Strongerrr t3_10o8vih in explainlikeimfive
redline83 t1_j6dac3i wrote
Reply to comment by [deleted] in Eli5 why aren't gas only vehicles far more fuel efficient than before by Live_Strongerrr
Only for a relatively short time until your battery is dead. The 12V system while the engine is running is supplied by the alternator, the battery just buffers it.
As proof, you can jump a car without a battery and the electronics will all work.
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