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Comment Re:What was the 20 page article? (Score 1) 246

This is very important. There's a light-year of difference among a typical scholarly article, a physics paper, a math paper, or some kind of incomprehensible humanities bafflegab that no sane person could comprehend. The former, if it's not too technical, should be readable to the average undergrad. The second and third might not be because there are so many specialized concepts and so much specialized language. The latter (and I'm not indicting everything coming out of the humanities, but a lot of it) is incomprehensible because it literally doesn't make sense.

Comment Re:how are they managing the heat? (Score 1) 122

oh I guess I really hadn't thought about heating needs. The batteries generate heat when being charged or discharged so I was just assuming they never really would need external heating.

I live in Iowa, and I've heard some pretty brutal accounts of bad EV performance when it gets really cold here. All rechargeable batteries perform poorly in the cold though, I remember NiCD batteries being absolutely terrible in the cold.

Comment Re:how are they managing the heat? (Score 3, Insightful) 122

75kW is a lot of heat. Think about the heat from a 100w light bulb (99% of which is heat) Now stack 750 of them and feel the sun!

Also, this car isn't flying down the freeway, forcing massive amounts of air through the radiator to cool it. This one's parked, and only has the forced airflow of the radiator's fan to keep it from melting into goo.

But that 75kW is talking about the charger, which may be able to handle more than one vehicle, or larger vehicles like EV trucks and busses, so the number is likely a lot smaller for the average EV car. But still, lotta heat!

Comment making plans (Score 2) 33

"It was hard to figure out how do you balance getting ready to go, not go, all that stuff,"

That must be pretty stressful... "hey you MIGHT be going to space in a few months, but maybe not! Plan accordingly!"

Those are some pretty radically different options there, going to space and staying on earth really aren't two separate scenarios that are easy to come up with a flexible plan that can cover both.

I recall Neil saying he wasn't able to get life insurance when he was flying the experimental planes, and so NASA had to cover him. I wonder how that works with astronauts? I can just imagine making that phone call to your insurance company.... heeeey say I'm going to be flying around the moon next month so... "thank you for letting us know, we've suspended your insurance coverage for the next two months". Gee thanks.

Comment constitution should be a "living document" (Score 1) 166

That phrase gets tossed around from time to time and this is why. The only reason we don't have warrantless searches and other intensely invasive government surveillance right now is it's specifically banned in the US Constitution. But of course the founding fathers knew nothing of cell phones, so this one is fair game.

Unfortunately for us, the Constitution, which the founding fathers envisioned as a "living document", one that was periodically updated to address new developments, only very rarely gets updated anymore. And all this modern tech that WOULD be in the constitution (like personal electronic devices, online privacy, etc) if they'd have known about it when it was written isn't, so it all just gets trampled on.

The concept of the Constitution as a "living document" is basically dead, and that's unfortunate for all of us. What we really need right now is a "Technology Bill of Rights". That would breathe some life into this important document, and bring us closer to what the founding fathers envisioned a free people to be protected by.

Comment Re:so many gadgets have built-in batteries (Score 1) 115

According to my notes, I have here:

9v: 13
AA: 13
AAA: 17
AAAA: 1
C: 8
D: 2
coin: about 30
SLA/FLA: 5
LIFE: 4
lipo/nimh pouch and pack: 25
lipo cell: 9
nicd/nimh cells: 20
sealed plug-in charged: 16
sealed usb-charged: 27
uncommon disposable: 3

Those are not battery cells, those are devices. So for example, 16 of my AA devices use six AAs. (I have a crap-ton of NiMH AA, well over 100) and all of my C devices use at least three cells. So, sadly for me, there's a huge amount to keep an eye on. I realize I'm somewhat of an edge-case here, but that also makes me a good "how bad can it really get?" case study.

Comment so many gadgets have built-in batteries (Score 1) 115

I reviewed all the gadgets in my house that have batteries. Not just non-replaceable or rechargeable, but ALL batteries. I'm a bit tech-heavy here so I was expecting there to be a lot, but the final count still surprised me. (and I'm still finding stragglers from time to time)

The "biggest offenders" I have are flashlights. I've got a few cheap "webcam" lights, as well as several house flashlights that all use built-in lipo pouches, which I can replace, but not the average consumer. And I've had to replace my car GPS batteries several times over the years. I'd bet 98% of these are thrown away as soon as their battery gets marginal. I like to maintain and repair my stuff, and it "grinds my gears" to see these made to be thrown away.

The other thing that annoys me is that most of these gadgets have almost no "battery management". When you plug them in, they charge to full, and hold at full charge if left plugged in, which will inflate a lipo pouch in a few months at most. And many of the others will allow their battery to deep-discharge to the point of battery damage or even placing the device in an unrecoverable loop. My Garmin GPSs are terrible that way. If they get too low, they'd be bricked for most people because they always boot up when their dead battery gets a little bit of a charge in it, which isn't enough to boot the device, and then the boot process crashes, draining the battery faster than it can charge. Recovering that requires removing the battery and manually charging it, which most users can't do since the battery isn't "user" removable.

And then I have the related problem of dozens of infrequently used devices that I could easily go a year between uses on, and when I get them out their battery is dead and probably slightly deeply-discharged. And I can't leave it on charge because it'll cook off the battery by the next time I need it. Which again is really frustrating.

Then there's the "big ticket items like the exploding (pun intended?) market on rechargeable yard maintenance. Be it a hedge trimmer or a mower. Nobody knows how to take care of their batteries, they don't tell you in the manual, and few have management, so they leave them on charge over the winter and the battery is half cooked by spring. Then after another winter on charge the battery is totally cooked and they have to replace a $40-$150 battery. It's quite the scam! Along with removable batteries, built-in management needs to be legally required for batteries over a certain price. Even my quad (DJI Spark)'s batteries are smart and will self-discharge to 65% if not used for 10 days straight - so it's not difficult to do even for smaller batteries, they just refuse to do it because they want to sell you new batteries regularly instead of making the batteries last.

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