I'm a bit surprised to not see mention in comments of "social vs sociable." There's often something nice about being around people that you're interacting with only minimally (sociable) vs being around people you're talking with (social). The shutdown in 2020 did away with a lot of options for"sociable."
If this is something you want to do you might consider a bike. A 6 mile round trip on for for coffee seems a bit much, but 3 miles each way on a bike shouldn't be bad unless you're in a city (in which case there should be things closer). You could also do this same thing with a thermos of coffee/tea and a local park.
Once the job situation is out of the way (which sadly might take a while in this market), I wouldn't mind that idea. It plays double duty in helping to loa weight I really need to lose as well. Any hesitation I have to bike around a few miles is entirely my own fault in terms of health, so I should buck that mentality.
My nearest park is 6-7 miles away, meanwhile. I don't know about going there for coffee, but it'd be a nice little bike route. My city does fortunately have quite a few dedicated bike paths as some solace against the usual car centric society.
Doing a quick bit of searching based on the 4680 makes me think that there has been or will be a change from NMC811 to LFP chemistry in the 4680, including one article talking about changing to US and European-based in-house manufacturing and reducing dependence on China.
I'm no fan of Tesla, but this looks like the collapse of the contract with the supplier for the battery chemistry they've moved away from, aka "no [more] big deal."
Which cell technology to use depends on the application. Tesla actually uses BYD blade batteries in some of their vehicles sold in Europe. The main issue with prismatic cells is that to be safe, they must be made with LFP chemistry, which hurts energy density. LFP is also worse at charging/discharging when cold, though battery management software mostly solves that.
Cylindrical cells make sense for higher performance NMC and NCA chemistries, as they can be cooled more easily (coolant lines can run in the voids between cylindrical cells), and any single cell failure is less likely to cascade to other cells. Batteries with cylindrical cells were easier to repair, but nowadays cells are welded together instead of bolted, so that's no longer an advantage.
> The main issue with prismatic cells is that to be safe, they must be made with LFP chemistry, which hurts energy density
This is obviously untrue. Tons of other chemistries have used prismatic cells with good safety as well. You think Macbooks and iPhones use LFP or cylinder cells?
> Batteries with cylindrical cells were easier to repair,
It can be just as easy to repair a prismatic battery as a cylinder battery. It all comes down to the layout of the battery. And as you mentioned, how the battery is constructed, if the battery is structural, etc.
Since this is a discussion about electric vehicles, I thought it could go without saying that I was talking about batteries in such vehicles, not batteries in consumer electronics that are 1,000 times smaller.
To use an analogy: If someone stores a gallon of gasoline in a single-walled plastic container, that's probably OK. But storing 1,000 gallons of gasoline without certain safety measures is unsafe. So it goes with battery capacities.
My point was about cylindrical cells with higher energy chemistries like NMC and NCA. Rivian uses cylindrical cells for their non-LFP batteries. Lucid uses 2170 cells. As far as I can tell, those three (Tesla, Rivian, Lucid) are the only US car manufacturers who have not had battery recalls due to fire risk.
GM, Hyundai, and Nissan all used pouch cells with higher energy density chemistries, and had recalls due to battery fire risks. Ford also recalled tens of thousands of their plug in hybrids due to battery fire risks, though they haven't found a solution yet beyond limiting the max charge of the battery. These batteries are also NMC pouch cells.
I'm sure it's physically possible to make safe, reliable pouch or prismatic cells using higher energy chemistries, but so far it has been risky for those who have tried.
But it still is untrue even in the discussion of electric vehicles. Tons of EVs have been made safely with chemistries other than LFP with prismatic cells. In fact most non-LFP EV batteries are pouch or prismatic, not cylinder.
Yep. Prismatic cells have poorer packaging-to-material ratio (circles are optimal). They offer better thermal properties, but thermals are not the main limiting factor anymore.
And the US automakers tried prismatic cells before. Chevy Volt used them in 2012!
Chevy sells EVs with prismatic and pouch cells. I don't recall any they've widely sold that used cylinder cells. Most automakers use prismatic cells on their cars, even non-LFP variants.
Also GM had to replace batteries in 142,000 Chevy Bolts & Volts due to fire risk, so I'm not sure that should count as an example of a successful use of non-cylindrical, non-LFP batteries.
It's more complicated. You can't pack the battery at 100% anyway, because you need cooling. Cylindrical cells are also more rigid, so they need less supporting material, or they can even be a part of the support structure itself.
Yeah, it's typical of Elektrec to interpret anything Tesla-related in the worst light.
I personally fact checked articles about "Autopilot disengages milliseconds before collision" and the one related to Benavides v. Tesla case.
In the first case they jumped to conclusions. In the second case they "forgot" to mention any details that contradict their narrative: that there were two cases separated by years, that the police has received all the information they needed in the first case, that the driver was pressing the accelerator.
My understanding is Fred (Electrek) has been nothing but negative about Tesla since he got upset that they haven't released the roadster yet. Something to do with having enough referral points to get one. It has become his whole identity and it is sad to see.
Pretty sure those comments are tongue in cheek. And it’s not that he’s dying to buy one, Tesla owes him one, and doesn’t have to fulfill it by never making any
HN audience loves to undermine one of the only places actually objectively calling out the mega corps
Does having larger LFP cells, like the 4680 format, allow this chemistry to be used in higher-performance models? Right now it looks like only the RWD basic models use LFP cells everything else uses NMC.
In some cities with HOV lanes on expressways having an EV (with plates) lets you use those lanes with only one person in the car. How important that is to any given buyer obviously depends on where and when they're driving.
Amazon no longer having a record of it is absurd given the volume of data they store about all transactions.
For a phone in particular I'd be demanding serial number/IMEI information for the police report and ensuring that the stolen phone was properly reported as stolen. Since they record all of that when they ship it should be readily available.
A lot of that is because those devices have far more than they actually need because the processors/packages are so cheap. Particularly if it's a relatively low volume item it's probably cheaper to just use a slightly overpowered component even if it's a penny or two more vs changing things.
Are you able to track balance checks made against card numbers not yet activated? That seems like it'd be a dead giveaway for physically tampered cards and if you could prevent activation of those it'd at least make tampered cards harder to use.
Presumably you could also take things back to the level of "store X, you have a serious problem."
>Are you able to track balance checks made against card numbers not yet activated?
Yes. Can't get into specifics. Not every card supports balance inquiry though. Not entirely sure how this applies to physical gift cards.
Usually what happens is that someone simply writes down the card number, and waits, and then tries to redeem it. They don't do a balance check.
>Presumably you could also take things back to the level of "store X, you have a serious problem."
We can get down to the register. Fraudsters are sometimes employees. But you can't treat customers like criminals so doing anything about it is hard. These same stores don't seem to mind customer info leaking and credit card data being stolen in the first place.
We sometimes have to replace these cards for consumers, because it's dumb to spend a hundred dollars for a giftcard and it was stolen previously, that's not their fault
The solution should be obvious to everyone: Just go back to 2008 and start running a large Apple developer conference in your country. If you do that, it should only take a week or two to get your problem resolved.
I'd say also that you should never purchase Apple gift cards from anyone except Apple directly, but if the card itself was tampered with (stolen, opened, scraped and code retrieved, re-covered with generically available scratch-off material, re-sealed, returned to the display) there's nothing keeping that from happening in Apple stores as well.
There is a technical measure that gift card providers could put in place to reduce this, specifically they could block activation of any cards with codes for which they've already started receiving activation/balance checks. There'd still be some risk (thieves would need to wait before testing cards and would have to hope for cards that were purchased but not yet redeemed) but it could be reduced somewhat.
> I'd say also that you should never purchase Apple gift cards from anyone except Apple directly
This would be a good measure assuming we’ve fully discovered all the reasons Apple might ban you for, and only reason happens to be gift cards.
Since we don’t know what other seemingly trivial actions may provoke Apple to wipe an account, I think starting a developer conference is the only way to be safe.
reply