12V battery. "Will I ever buy another Tesla? Guess."

[David_Cary]

Here is one unique problem of the 12V battery compared to an ICE car.
It is a guaranteed failure point. The ICE car has several other guaranteed failure points.
For my S - it has been 50% of my failures - so that is a big deal. For an ICE, not such a great percentage.

2015. First failure at 54k miles (3 years); Second failure at 80k miles (4.5 years). Mobile has come to my car 3 times - and this was 2 of them (other was Takata recall). It has represented 33% of my out of warranty costs. Went to SC for battery heater ($800).

With my N of 1, the failure rate is accelerating. Interesting how Brec had nearly the exact same failure timing - so now an N of 2.

 

[Zooomer]

The Ohmmu battery is a good buy unless you bought an old used Tesla and can't afford one.

It lasts longer, you have peace of mind, farther range, more reliability, better handling/braking, etc.

These differences are small but people are emotional not logical.
It would seem you pay over $1000 for every 10 miles of range increase (where you can do this, averaged over the years).

If you said to someone, do you want the bigger battery for 5 grand, the car goes 50 more miles, they would understand and most would upgrade. If you said, do you want 1 more mile of range for $100, the same person may say 'no, 1 mile isn't worth it'. It's weird. Clearly going from 250 to 251 is more valuable than 300 to 301 so the later 1 mile upgrade would actually be a better value.

My only point here is that people tend to quantify costs, even when small but they ignore performance gains when they are small.

 

[hcdavis3]

Uhmmu ROFL

Don't fall for that snake oil.

Thanks Ostrich. I bought an Ohmmu but as soon as it arrived the latest software killed it. You get the same replace battery warning even though, the battery is supposedly fine. As of today I don’t believe there’s a fix. I’m gonna install it in my 20KW generator this fall when it it gets serviced. Sounded like a good idea at the time, but I don’t want my 3 showing codes all the time. Plus the reset for the codes currently is a major pain in the ass from what I’ve read. I’m sure the Ohmmu will be fine in my generator.

 

[aerodyne]

Working on, as in dropping the pack and opening it up to replace the contact.

The Ohmmu battery is a good buy unless you bought an old used Tesla and can't afford one.

It lasts longer, you have peace of mind, farther range, more reliability, better handling/braking, etc.

These differences are small but people are emotional not logical.
It would seem you pay over $1000 for every 10 miles of range increase (where you can do this, averaged over the years).

If you said to someone, do you want the bigger battery for 5 grand, the car goes 50 more miles, they would understand and most would upgrade. If you said, do you want 1 more mile of range for $100, the same person may say 'no, 1 mile isn't worth it'. It's weird. Clearly going from 250 to 251 is more valuable than 300 to 301 so the later 1 mile upgrade would actually be a better value.

My only point here is that people tend to quantify costs, even when small but they ignore performance gains when they are small.

Tesla OEM...160 ish

Ohmu...416

To break even, the Ohmu would have to last....2.6 times as long.

Assuming MTBF of OEM batt at 3 years, that is 7.8 years.

Not including the loss of use of money during that time. I'd rather buy the cheaper batt, use the remainder to buy a share of TSLA after the split.

 

[ucmndd]

It lasts longer, you have peace of mind, farther range, more reliability, better handling/braking, etc.
.

lol wut

 

[ngng]

The Ohmmu battery is a good buy unless you bought an old used Tesla and can't afford one.

It lasts longer, you have peace of mind, farther range, more reliability, better handling/braking, etc.

These differences are small but people are emotional not logical.
It would seem you pay over $1000 for every 10 miles of range increase (where you can do this, averaged over the years).

If you said to someone, do you want the bigger battery for 5 grand, the car goes 50 more miles, they would understand and most would upgrade. If you said, do you want 1 more mile of range for $100, the same person may say 'no, 1 mile isn't worth it'. It's weird. Clearly going from 250 to 251 is more valuable than 300 to 301 so the later 1 mile upgrade would actually be a better value.

My only point here is that people tend to quantify costs, even when small but they ignore performance gains when they are small.

the only point here is you have no ideas how cars work

 

[Cheburashka]

lol wut

Technically if the battery is lighter you get some weight savings and a tiny percentage of range.

 

[ngng]

Technically if the battery is lighter you get some weight savings and a tiny percentage of range.

technically correct. the best kind of correct

 

[ucmndd]

Technically if the battery is lighter you get some weight savings and a tiny percentage of range.

Of course. But touting this tiny and completely negligible efficiency gain as a primary benefit of spending $400 for a fancy battery is super goofy and self serving.

 

[PhilDavid]

Of course. But touting this tiny and completely negligible efficiency gain as a primary benefit of spending $400 for a fancy battery is super goofy and self serving.

Wait, are you telling me that I have been delaying all my meals until I get home for extra range/weights savings all for nothing?!