First report for Donut lab battery is out. Here is the TLDR

Specs

    26 Ah nominal capacity at 1C discharge rate

    94 Wh nominal energy with 3.6V nominal voltage

    Operates within 2.7V – 4.15V recommended range (max charging to 4.3V)

What was verified

    5C charging (130A): 0-80% in ~9.5 minutes, 0-100% in ~13.5 minutes

    11C charging (286A): 0-80% in ~4.9 minutes, 0-100% in ~7.3 minutes

    Successfully delivered 98.4-99.6% of charged capacity even after extreme 11C charging

Thermal Management

    Tested with both one-sided and two-sided heat sinks to simulate real-world conditions

    With dual heat sinks: Peak temps of 47°C (5C) and 63°C (11C) — well within safe limits

    With single heat sink: Reached 61.5°C (5C) and up to 89°C (11C) — still functional but approaching thermal limit

Missing claims

    Energy density: No weight and volume was mentioned

    Cycle life: VTT ran only 7 test cycles total.

    Cost Claims: Nothing about cost is mentioned

    Material Claims: No chemical analysis or materials analysis.

    Extreme Temperature Performance: No cold weather testing. No high-temperature testing.

    No abuse testing: No nail penetration, no overcharge, no short-circuit, no crush tests.

But according to the company website another report will drop next monday (March 2nd).

It’s good to know that it does at least perform about as well as current conventional batteries. The energy density and cycle life were the really off-the-wall claims. It’s exciting to hear that they’re continuing to test, can’t wait for more third party results!

Edit: Reading the report, they talk about “charge capacity” (Amp hours in/out) efficiency of 98.4% to 99.6%, but this seems potentially misleading. The actual charge energy efficiency is more like 90%.

> Successfully delivered 98.4-99.6% of charged capacity even after extreme 11C charging

Note the Wh numbers for discharge vs. charge energy.

> Discharge capacity Charge capacity Discharge energy Charge energy

> Cycle 1 26.109 Ah 26.159 Ah 91.021 Wh 100.793 Wh

Yup, those 2 are the ones I really want to see.

The energy density isn't out of line if this is a true solid state battery. The cycle life, though, is AFAIK. I don't believe solid states have that sort of cycle life.

> Energy density: No weight and volume was mentioned

Note that the report includes some photos of the battery, so we can assume that it's not, like, several orders of magnitude larger than what they advertised.

EDIT: Honestly, I'm pretty excited. Even if their promises on cost and materials don't pan out and the lifetime turns out to be terrible, what they've just demonstrated is already a game-changer.

I built a small web tool that generates a single install command for multiple Linux applications. You select apps and a distribution (Ubuntu, Fedora, Arch, etc.), and it outputs grouped commands for APT, DNF, Pacman, Flatpak, Snap, and AUR, including setup steps when needed.

I built a small web tool that generates a single install command for multiple Linux applications. You select apps and a distribution (Ubuntu, Fedora, Arch, etc.), and it outputs grouped commands for APT, DNF, Pacman, Flatpak, Snap, and AUR, including setup steps when needed.

Inspired by the friction of repeatedly setting up fresh Linux machines.

Hi guys, after your feedback from last time, I have turned my simple storage cost calculator into a financial cost modeling tool. I have made every effort to include all types of costs involved. Do you think I have missed something? I would love to hear your thoughts on it.

I have read and watched these articles and videos where people seem to have a problem with Microservice, Kubernetes, cloud providers, or anything that's not a PHP server sitting behind an nginx running on a $5 VPS. I have also seen the front-end analogy of these types of posts, where anything that is not written using HTML, CSS, and jQuery is unnecessary bloat. I will soon write a blog, which I think will cover more points and nuances of both sides. For now, here are some of my scattered thoughts.

- If deploying your MVP to EKS is overengineering, then signing a year-long lease for bare metal is hubris. Both think one day they will need it, but only one of them can undo that decision.

- Don't compare your JBOD to a multi-region replicated, CDN-enabled object store that can shrug off a DDoS attack. One protects you from those egress fees, and the other protects you from a disaster. They are not comparable.

- A year from now, the startup you work for may not exist. Being able to write that you have experience with that trendy technology on your resume sure sounds nice. Given the layoffs we are seeing right now, putting our interest above the company's may be a good idea.

- Yes, everyone knows modern CPUs are very fast, and paying $300/mo for an 8-core machine feels like a ripoff, but unless you are business of renting GPUs and selling tokens. Compute was never your cost center; it was always humans. For some companies, not being able to meet your SLA due to talent attrition is scarier than the cloud bill.

I know these are one-sided arguments, and I said I would cover both sides with more nuance. I need some time to think through all the arguments, especially on the frontend side. I will soon write a blog.

I thought capitalism was about adding value, not conflict of interest

Most cloud pricing calculators online are built by a cloud provider or storage server seller. As a result, they are too simplistic and always show their option as the cheapest. I have built an actual pricing calculator that takes into account every single variable to give you a detailed yearly breakdown for both scenarios.

You will be surprised to learn that once you start accounting for different variables, on-premises may not always be the cheapest option.

Features: • Comprehensive cost analysis over 1-30 years • Hardware, software, power, bandwidth breakdowns • Real-time cost projections with growth factors • Interactive charts & detailed comparisons • Export-ready financial models

Intresting, I am working on another list of more advance rate limiting algorithms. I will add GCRA there.

Sorry about that that is my blogging platform Hashnode. It was lesser of four evils:

- Medium which paywalls the article and forces you to sign up just to read.

- Substack has same problem, it's great for funneling people to your paid newsletter but there is a sign up banner as soon the page loads.

- Build your own and miss out on the social aspect and there's no proof if the numbers are real.

hashnode is good. i support you, keep trucking.

Does CGNAT do rate limiting? If so then is there some documentation I can lookup.

I'm pretty sure GP means: all those users have egress from a finite number of IPv4 and thus if rate limiting is done by IP those behind the NAT are going to have a real bad time. It's true of all NAT setups, but the affected audience size for GCNAT could be outrageous

Yup, thank you.

- I like bullet points, they are easy to read.

- "Working" I wanted to keep things consistent.

- Content getting cut was a limitation of iframe. Most blogging platform don't allows you to embed another page. This was best I could do given the limitation.

- I do use AI to bounce ideas, but a lot of effort went into getting the apps working as intended.

Why "Working?" It's unclear what that means.

Is it supposed to say, "How it works"?

Now that you have mentioned it should have been working principle or algorithm. It made sense in my head. English isn't my first language sorry about that.