Tesla vs volt ibooster1/5/2024 ![]() ![]() In fact, Tesla had a reoccurring issue with its 12-volt batteries. If you’re frequently tapping into your battery bank, that could mean that your batteries may need a replacement in less than two years. Lead batteries are good for about 500 to 1000 cycles as the best deep cycle. ![]() Not only that, but lead batteries have a limited cycle life. What’s the difference between these two?įor starters, lead-acid batteries are far cheaper than lithium-ion batteries up front, but over the course of the batteries’ lifetime, lithium-ion batteries make far more sense. So the 12V battery in my Tesla must be lithium-ion like my high volt battery, right? NOPE! Much like that of a gas-powered car, your Tesla has a lead-acid 12V battery (minus the refreshed 2021 S & X). This is one of the reasons why a 12V battery was added to the gen 2 Roadster and every other Tesla up to this point. The problem with that is if the high volt battery needed to be powered down, such as after an accident, all of the 12V systems shut down as well as safety features, like the hazard lights, no longer worked. Instead, a DC to DC converter was used to take energy from the main battery and power the 12V system, such as the headlights, turn signals, media controls, etc. When the first-gen Roadster was designed, it actually didn’t have a 12V battery. Obviously, the big difference between an EV and a gas-powered car is the lack of an engine, but when you pop the frunk of your Tesla, you still have access to things, like brake fluid, washer fluid and even a 12V battery.įor some people, it may have come as a surprise that their Tesla even has a 12V battery, especially since there is a high volt battery that could easily provide all the energy they need for their 12V systems. If you’re like a lot of car owners, you probably don’t pay much attention to what’s under the hood. Why does your Tesla have a 12V battery when it has access to a gigantic battery under the floorboard of the car? Let’s get into it. Why Does Your Tesla Have A 12V Battery?.
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