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SwtCyber commented on CO2 batteries that store grid energy take off globally   spectrum.ieee.org/co2-bat... · Posted by u/rbanffy
lambdaone · a day ago
This seems almost too good to be true, and the equipment is so simple that it would seem that this is a panacea. Where are the gotchas with this technology?

Clearly power capacity cost (scaling compressors/expanders and related kit) and energy storage cost (scaling gasbags and storage vessels) are decoupled from one another in this design; are there any numbers publicly available for either?

SwtCyber · 16 hours ago
The funniest part is that the "implicit cooling cycle" might be more valuable for grid alignment than raw efficiency
SwtCyber commented on CO2 batteries that store grid energy take off globally   spectrum.ieee.org/co2-bat... · Posted by u/rbanffy
AndrewDucker · a day ago
No mention of round-trip efficiencies, and claims are that it's 30% cheaper than Li-Ion. Which might give it an advantage for a while, but as Li-Ion has become 80% cheaper in the last decade that's not something which will necessarily continue.

Great if it can continue to be cheaper, of course. Fingers crossed that they can make it work at scale.

SwtCyber · 16 hours ago
I agree with you: the real test isn't whether it's 30% cheaper today, but whether it holds its economics over 20–30 years at scale
SwtCyber commented on CO2 batteries that store grid energy take off globally   spectrum.ieee.org/co2-bat... · Posted by u/rbanffy
Jean-Papoulos · 20 hours ago
>The company uses pure, purpose-made CO2 instead of sourcing it from emissions or the air, because those sources come with impurities and moisture that degrade the steel in the machinery.

So no environmental advantages. It's supposedly 30% cheaper than lithium-ion, but BYD cars have sodium-based based batteries on the road right now which CATL says will end up being 10-20$/kwh (10x cheaper than current batteries).

So what's the actual advantage of this ? I think it's just lucky to land just at the right time where batteries aren't cheaper enough yet.

SwtCyber · 16 hours ago
Even if sodium-ion really gets to $10–20/kWh, you still have degradation, cycle limits, fire risk, and a practical lifetime that's maybe 10–15 years
SwtCyber commented on CO2 batteries that store grid energy take off globally   spectrum.ieee.org/co2-bat... · Posted by u/rbanffy
usrusr · 17 hours ago
I wonder how much Google is factoring in the implicit cooling cycle? Because any pressurized gas energy storage is either including some advanced heat storage or is just venting the heat created during compression (the ancient Huntorf facility in Germany is infamous for that, super wasteful)

Usually you want to keep the heat and put it back into the compression medium during decompression and hope that losses from the heat storage aren't too big, but when you have a cooling use case nearby, you can use that low intensity heat to compensate heat storage losses, or even overcompensate. When you consider how much of the power input of a datacenter is typically used for cooling, compressed gas storage could be useful even if there was zero electric recovery (just time-shifting the power consumption for cooling to a time with better energy availability)

SwtCyber · 16 hours ago
If Google is colocating these with data centers, even low-grade heat that would otherwise be a loss could still be useful, or at least reduce how much active cooling the DC needs
SwtCyber commented on CO2 batteries that store grid energy take off globally   spectrum.ieee.org/co2-bat... · Posted by u/rbanffy
SwtCyber · 16 hours ago
The real question for me isn't the physics so much as ops over 20–30 years: maintenance, leakage, real-world efficiency after thousands of cycles
SwtCyber commented on What the heck is going on at Apple?   cnn.com/2025/12/06/tech/a... · Posted by u/methuselah_in
OddMerlin · 15 days ago
I recently purchased an iPad Air and am blown away at how bad the UX is. Notes is incredibly buggy, the iOS is not optimized for the pencil pro (seems like it delivers very little value outside of visual arts programs), the Siri +gpt experience is laughable, and I can go on…

I’m a long time Apple user and I’m concerned with the state of things.

Im considering returning this piece of junk.

SwtCyber · 15 days ago
The iPad line in particular feels like the part of Apple's ecosystem that hasn't figured out what it wants to be
SwtCyber commented on What the heck is going on at Apple?   cnn.com/2025/12/06/tech/a... · Posted by u/methuselah_in
jaredcwhite · 15 days ago
Poor analysis. Apple is doing quite well as a Big Tech company that simply doesn't need to "pivot to AI" like everyone else. Their missteps in "Apple Intelligence" have in fact demonstrated that they don't actually need to have much of a "strategy" here at all. In fact, if they simply link out to other people's chatbots and make it totally opt-in, that would be ideal.

The much bigger problem is that they've lost the wow factor in their software design, and in some regards the hardware as well even though the internals and build quality has never been better. Apple needs a design shakeup far more than it needs anything to do with AI, a poison pill which will bring the entire industry down in 2026.

SwtCyber · 15 days ago
But I don't think the choice is quite as binary as "pivot to AI" vs "ignore AI entirely." What's changed in the last two years is that user expectations are shifting at the OS level, not just the app level
SwtCyber commented on What the heck is going on at Apple?   cnn.com/2025/12/06/tech/a... · Posted by u/methuselah_in
827a · 15 days ago
IMO: Cook is going to announce his retirement by the end of Q1, they've already selected a CEO (probably Ternus), the incoming CEO wants leadership change, and some of these departures are because its better that this purge happens before the CEO change than after. I think this explains Giannandrea, Williams, and Jackson.

Dye may have also been involved in that, given how unpopular he was internally at Apple. But more likely just personal / Meta offered him a billion dollars. Maestri leaving was also probably totally uninvolved.

Srouji is the weirdest case, and I'm hesitant to believe its even true just given its a rumor at this point. Its possible he was angry about being passed over for CEO, but realistically, it was always going to be Ternus, Williams, or Federighi. If Ternus is the next CEO, its likely we'll see Apple combine the Hardware Technologies and Hardware Engineering divisions, then have Srouji lead both of them. I really do not see him leaving the company.

The other less probable theory is that they actually picked Fadell, and this deeply pissed off many people in Apple's senior leadership. So, what we're seeing is more chaos than it first seems.

Generally, as long as Srouji doesn't leave, these changes feel positive for Apple, and especially if there's a CEO change in early 2026: This is what "the fifth generation of Apple Inc" looks like. I don't understand the mindset of people who complain about Apple's products and behavior over the past decade, then don't receive this news as directionally positive.

SwtCyber · 15 days ago
Your last point is the interesting one: for years people have complained that Apple has gotten slow, conservative, and repetitive. Maybe, this is what the reset looks like
SwtCyber commented on What the heck is going on at Apple?   cnn.com/2025/12/06/tech/a... · Posted by u/methuselah_in
skeeter2020 · 15 days ago
3 retirements and a VP taking an obvious promotion at Meta: not really the "sky is falling" event they try to paint. Tim Cook stepping down would (if it even happens) be a big deal, but he's not the heart of the company. He's been an extremely compentent accountant; enjoy your retirement party and gold watch. And to suggest they are falling behind because they're not investing hundreds of billions in an AI "strategy" that shows no pay-off - while the other tech companies start to scale back their capital investments? I've never been a huge Apple fan as a company but their current situation makes me more bullish than ever.
SwtCyber · 15 days ago
I think people are reacting less to who left and more to when
SwtCyber commented on What the heck is going on at Apple?   cnn.com/2025/12/06/tech/a... · Posted by u/methuselah_in
SwtCyber · 15 days ago
Apple usually manages succession quietly and years in advance... seeing multiple senior people leave in the middle of an industry platform shift is unusual for a company that's spent two decades projecting stability

u/SwtCyber

KarmaCake day316February 25, 2025View Original