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You can buy software that helps a chemist to synthesize compounds: SYNTHIA™ Retrosynthesis Software (sigmaaldrich.com) I haven't heard of machine learning or AI being applied on a large scale to battery technology. My current opinion is that battery technology will end with rechargeable...

Yes, and no. I did look them up. They might under more scrutiny for their quality control, just as Boeing and General Electric (or Teledyne, where I work) has to jump through more hoops. For the most part, Chinese companies are left alone unless they do something that embarrasses the government...

Yet they've been around for some years now. I don't think they've upgraded the batteries since introduction, but using current battery technology would improve range.

Take a look at what you posted earlier. "Tons" isn't a unit of battery capacity. Ampere hours, Watt-hours, or kilowatt hours are appropriate units.

I never said they were perfect. Even the Leaf with 100 mile of range would cover 99% of my driving. Likewise, the electric Pipistrel would be a fun and practical plane for me. Back to your EV- try taking some of that ton of capacity out and your range will improve. Any vehicles' range will...

You seem to be the only one with issues with your EV. You know, if you have a ton of stuff in it, try reducing the weight you carry. You'll get better range.

Says you. IIRC, you didn't think a 700-mile electric car was possible either.

I like the Pipistrel. A couple of hours flying time and charge it when you land. That's practical for me.

With the current efficiencies in ICE, 25% is all you need for a battery equivalence. Most of the energy burned in an ICE is thrown away as heat.

I thought you meant manned vehicles. I think side-scan sonar was used to find the ship.

Says the guy who doesn't know the basics of chemistry. Without that knowledge, all you have is a wrong opinion.

A powered parachute is an experiment. you can only fly it in still air for a few minutes. Nobody can make money or breakeven with them. People fly them.

no, 0 to 3 °C Deep ocean water - Wikipedia Think about how ice skates work. Pressure melts ice.

You haven't defined practical. Without a definition, your dismissal of the plane is meaningless. Also, since you have told others that they read you post improperly, read the link again since the range is more than 18 minutes. It's not experimental. They sell it as a certified aircraft.

And maybe more than 5x. I won't say there's no limit, but I won't say such a low limit either.

Are you sure? I don't think Alvin was tethered. DSV Alvin - Wikipedia

The article is about an electric twin engine plane. Here's a certified electric plane: Velis Electro - Pipistrel (pipistrel-aircraft.com) SSBs may go beyond that 2 to 3x the energy density of current batteries too.

No, you didn't read the sentence as I intended. There's a spectrum between current battery technology (20% of the way there) to new work such as solid state and multivalent batteries that will get us to 60%.

It's obvious you don't know chemistry. ALL chemistry involves the movement of electrons, whether electrons moving between ions or electrons moving between covalent bonds.