GBatteries (YC W14) let you charge your car as quickly as visiting the pump

In the case of flow batteries, don't a lot of them have poor power to weight figures? Those liquids are heavy, but aren't nearly as power dense as gasoline.

Telsas do that, FYI. They take elevation and temperature during a trip to estimate where on the energy usage curve you are at any point in your trip.

Here's an article from 2015 when they introduced that feature: https://www.teslarati.com/closer-look-tesla-firmware-6-1-tri...

Have you seen the size of our vehicles? Of course! ;)

That's the time it takes to visit the convenience store. Relevant in some circumstances, but if you're not already in need of a break you only visit the pump and even five minutes is oddly slow. And the article and company site specifically say the time to fill the tank, not to visit a gas station. So they're blatantly lying.

Super skeptical here, or at least the wording is misleading as hell.

> The product allows users to charge a 60kWh EV battery pack with 119 miles of range in 15 minutes as compared to 15 miles in 15 minutes today.

> The technology works with off-the-shelf lithium ion batteries and existing fast charge infrastructure by integrating via a patented self-contained adapter on a car charge port

First read says that they're delivering 60kWh in 15min, or they're pumping electrons at 240kW. This is just nonsense -- most deployed DC fast chargers are 50kW... the charger companies and the OEMs are experimenting with 200kW chargers, but those are liquid cooled. So physics says this is nonsense.

Okay, so second read: the 60 kWh is distracting technobabble, and what they're ACTUALLY doing is "adding 119 miles of range in 15 minutes."

The just-announced Nissan Leaf e+ has a 62 kWh battery with 226 miles of range. When you DC Fast Charge, going from 0-80% takes about as much time as going from 80-100% (EV roadtripping is about doing frequent small charging because of this phenomenon, not one-time top-offs like with gas).

The Nissan Leaf e+ is about a 60 kWh battery, and if they're adding "119 miles of range in 15 minutes", that's about half the Leaf's 226 mi range, so call it "30 kWh of charge in 15 min". That means they're charging at an average of 120kW. Okay, now we're back within the realm of physics.

Note the Leaf e+'s (yet unreleased hardware) still only accepts a maximum of 100kW DC fast charging. I think jaguar has experimented with 150kW charging on the ipace (but again, liquid cooled cables).

So they're saying they found a way to cycle fast charging and get about a 20% improvement in average charging rate from the current kinda-top-of-the-line tech, and only for the first 50% battery capacity.

Not nothing, but hardly "as quickly as visiting the pump", especially since whatever tricks they use likely won't continue for the next 50% of the battery.