Perl seems to be dying. Everybody loves bash again now, and python, go, node.js, etc..

A big miss by the Perl community was not getting AWS Lambda support or an AWS module for a long time. Boto ate Perl's lunch.

Sure, but what kind of differences are there between battery chemistries at say 32F or 0F at different states of charge?

I generally don't consider LiPos for cold-weather deployment, for instance. Though, maybe that's wrong to do.

That is actually pretty interesting, thanks.

I've heard of Exide but hadn't really been aware of some of those features, or hadn't yet run into the problems that would make those features interesting enough to remember. All I saw was a higher price tag but I can see the value now. :)

Yeah, I seem to be getting tripped up on the difference between gravimetric energy density and power density.

The abstract says an "energy density up to 20 Wh/kg, power density up to 20 kW/kg".

Do you have any suggestions on relating that power density quantity to other battery types?

I get 2-3kWh out of my 90lb 155Ah 12VDC AGM/SLA batteries sipping at a 60hr rate. But that battery is about 41kg, so what do they mean by 20 kW/kg?
Shouldn't I get 41kg/battery * 20kW/kg = 1800kW/battery? Reducing that to 1.8MW doesn't seem realistic. What's the right way to think about this?

Hrm, yes. In the abstract, it says "energy density up to 20 Wh/kg, power density up to 20 kW/kg". (http://pubs.acs.org/doi/abs/10.1021/acsenergylett.6b00295)

I suppose I'm getting tripped up on the difference between "energy density" and "power density".

I use VmaxTanks SLR155 AGM/SLA 155Ah 12VDC batteries (https://www.vmaxtanks.com/SLR155-AGM-Solar-Battery-_p_66.html).
These weigh 90lbs (40.9kg) and can store 2.1kWh of energy. (2.1kWh)/(40.9kg) = 51.3Wh/kg, which is about what you said.

So, you're right. 20Wh/kg FnCu < 51.3Wh/kg PbS. The difference in units between "energy density" and "power density" appears to be time.

How would you relate the gravimetric power density of 20kW/kg of the proposed battery cells to that VmaxTanks battery?

Or, what is the distinction between gravimetric energy density and power density?

I'm curious how these cells perform in cold weather conditions.

I use 12VDC lead-acid SLA batteries on a mountain top for a wireless repeater but those are like 0.05kw/kg and $280-300/ea. Getting heavy batteries up the mountain can be extremely challenging (think snowshoes uphill in 5-6ft of snow carrying a 100lb replacement battery). I'm also at the 49th parallel so winter peak solar is like 3 hours/day and you need a large buffer in case it is effectively zero hours of solar for days in a row while keeping your radios up 24/7.

Something like this would be great for me since it's something like 1500x more energy dense by weight... That is, if it can survive cold weather, or with a heater it is still an effective alternative.

Good argument, you're right.

I bet Kumar is laughing his ass off that Harold has to suck a dick.

There were the genderless J'naii in The Outcast (ST:TNG 05x17) who Riker pressured into sexual relations.

Captain Janeway in Voyager was widely believed to be a lesbian, despite her marriage.

Tasha Yar on TNG always talked about the rape gangs but held a position as chief security officer and was widely believed to be a lesbian or at least bi-sexual (and willing to get it on with fully-functional androids).

In ST:TNG 01x14 "Angel One", the Enterprise sends an away team to a female dominated planet. They take great pleasure in feminizing and dominating Riker and all of the men in that society are made to be feminine (by Earth standards).

This fits nicely with Blue Origin. It's one thing to get to space but you're going to need habitats and biospheres and other large scale structures once you get there. Bezos has talked about moving industrial activities off Earth along with mining asteroids.

I suspect they will learn a thing or two about building these structures on Earth that will be applicable to the longer-term goals of the space-faring Bezos.

Somebody has been watching too much Burlesque...

Exactly.

http://www.ubnt.com/ + RadioMobile + Renogy solar panels and charge controller + 155Ah VMaxTanks SLA/AGM battery (or two)

I was in your situation and did a 5 mile PTP backhaul with PowerBridge M5 400mm dishes and 900MHz for PTMP. I was actually worse off with only satellite internet availability that had terrible latency (700-1500ms+) and strict bandwidth caps (38GB/month, throttled at 85%) and no bandwidth accounting reporting. I actually had to gang together two WildBlue connections to get that and was paying just over $200/month.

Fixed terrestrial wireless is amazing and it will work for you if you put in the effort. Expect to spend $1500-2000 to get the radios, solar panels, batteries, STP cables, battery boxes, masts, etc.. I enjoy 50Mbps now.