While browsing news on Transport Evolved, I spotted this video. Its not about Tesla, but just EVs in general. I thought it worthy of posting a link to it. I pasted the author's comment section to help understand the background. Tech Primer: Why 12-Volt Batteries in Electric Cars Get Sick -- And How To Keep Yours Healthy Published on Mar 13, 2017 Today's video is inspired by a problem we had this morning at Transport Evolved's headquarters: namely a flat battery on our 2013 Nissan LEAF Staff Car. But we're not talking about the main traction battery here: we're talking about the 12-volt accessory battery that's used to provide power to lights, radio and on-board computer -- as well as start the car. Just like the 12-volt starter battery in an internal combustion engine car, having an issue with your electric car's 12-volt battery can be extremely frustrating. But what causes the problem -- and how can you fix it? Support Transport Evolved by donating to our Patreon campaign at Transport Evolved is creating a cleaner, greener smarter and safer world. | Patreon.