3 ms·

> While I get dressed, I turn on extended range mode and turn the heat on. What is "extended range mode" sorry? I'm aware of preconditioning, setting departure

> While I get dressed, I turn on extended range mode and turn the heat on. What is "extended range mode" sorry? I'm aware of preconditioning, setting departure time etc.

extrapickles 5y ago
That is where you fill the battery to 100%, this puts extra wear on the battery so you want to minimize the amount of time at 100%.
- mrfusion 5y ago
  So how bad is 30 minutes at max charge vs say 24 hours?
  - hnuser123456 5y ago
    https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries https://batteryuniversity.com/article/bu-808-how-to-prolong-...
crazcarl 5y ago
Generally you don't want to charge the battery past about 80% unless you're going to use it right away. So the "extended range" charge would be charging past that 80%.
cptskippy 5y ago
Lithium Ion batteries don't like being completely full or completely empty. They're happiest somewhere in the middle. Teslas allow you to set the max charge %. The interface has changed over the years but it's more or less a slider allowing you to set the max charge %. In it's latest incarnation you can do 1% increments, in the past it was less granular. When you plug the car in, an interface appears on the main display allowing you to adjust the % as well as charge rate and some other things. You can also adjust the settings from the App on your phone. Typically you'd set it to X% and forget about it until you were planning a road trip then you might crank it up to 100% either the night before or while sitting at a supercharger.
- itsyaboi 5y ago
  > Teslas allow you to set the max charge % This should really be a standard OS feature on Android phones.
  - cptskippy 5y ago
    It's been alleged that when some EVs report 0% charge, they're just preventing you from over draining the battery and damaging it. I wish they'd put bounds on both ends of the battery like that.
    - itsyaboi 5y ago
      Absolutely correct. IIRC teslas (at least older models, not sure about recent ones) use standard 18650 lithium ion cells. Discharging those past a certain voltage (~2.5v?) will permanently damage the cell and is prevented by the battery management subsystem. In theory it is possible to keep driving the car past a "0%" charge, assuming the safety systems could be bypassed, but you would never get the same range/acceleration on subsequent charges. Worst case would need am entirely new battery pack.

> While I get dressed, I turn on extended range mode and turn the heat on. What is "extended range mode" sorry? I'm aware of preconditioning, setting departure time etc.

extrapickles 5y ago

That is where you fill the battery to 100%, this puts extra wear on the battery so you want to minimize the amount of time at 100%.

mrfusion 5y ago
So how bad is 30 minutes at max charge vs say 24 hours?
- hnuser123456 5y ago
  https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries https://batteryuniversity.com/article/bu-808-how-to-prolong-...

crazcarl 5y ago

Generally you don't want to charge the battery past about 80% unless you're going to use it right away. So the "extended range" charge would be charging past that 80%.

cptskippy 5y ago

Lithium Ion batteries don't like being completely full or completely empty. They're happiest somewhere in the middle. Teslas allow you to set the max charge %. The interface has changed over the years but it's more or less a slider allowing you to set the max charge %. In it's latest incarnation you can do 1% increments, in the past it was less granular. When you plug the car in, an interface appears on the main display allowing you to adjust the % as well as charge rate and some other things. You can also adjust the settings from the App on your phone. Typically you'd set it to X% and forget about it until you were planning a road trip then you might crank it up to 100% either the night before or while sitting at a supercharger.

itsyaboi 5y ago
> Teslas allow you to set the max charge % This should really be a standard OS feature on Android phones.
- cptskippy 5y ago
  It's been alleged that when some EVs report 0% charge, they're just preventing you from over draining the battery and damaging it. I wish they'd put bounds on both ends of the battery like that.
  - itsyaboi 5y ago
    Absolutely correct. IIRC teslas (at least older models, not sure about recent ones) use standard 18650 lithium ion cells. Discharging those past a certain voltage (~2.5v?) will permanently damage the cell and is prevented by the battery management subsystem. In theory it is possible to keep driving the car past a "0%" charge, assuming the safety systems could be bypassed, but you would never get the same range/acceleration on subsequent charges. Worst case would need am entirely new battery pack.