Las Vegas has already achieved 97% storage supply for its needs - a city that barely sleeps at night.

Again, where is your evidence that it is not going to improve across the board, and will all fail?

“It’s not all happening right now,” is not even close to a convincing answer. If that was the reason to exclude any technology, there’d be none.

And it’s an especially ironic answer given that it takes up to 20 years to commission a nuclear power plant. And they are down for scheduled maintenance for up to a month a year, etc.

Why wouldn’t solar and other renewables combined with batteries be better?

It’s very early days, yet California recently had 98 days on renewables. That started in winter.

What is it about renewables with batteries that you believe will fail, despite the mass adoption that is under way?

Why will the projected, continued decline in battery prices and advances in battery tech not occur?

Why would adjacent solutions, like the massive storage ability of vehicle-to-grid, be worse compared to nuclear?

Why are so many “in the know” getting it so wrong?

The person I responded to only has one device. But even if there were multiple devices, you could just have a smart switch per device.

The fire hazard issue is that holding the battery at 100% increases the internal chemical stress on the battery, and increases the risk of thermal runaway. So keeping it well below that will definitely have significant benefit. Ideally, trickle charging it at around 50% would be best for almost eliminating further strain. (But you’ll likely need to charge it from 20-80% occasionally to help the battery management system keep calibrated.)

And things can be done even smarter. Like only charge the battery at the coldest part of the day, typically early morning to reduce heat stress. Or throttle the device if it’s temperature reaches a threshold. Etc.

Yes, if you can remove the battery, that’s helpful. But keep in mind you lose the benefit of battery backup during mains failure.

Also, mobile phone fires get a lot of media attention because “drama,” but they’re not the hazard everyone thinks they are. You’re far more likely to have a house fire from rodents chewing into electrical cables, clothes dryer lint catching fire, or anything with a heating component. Ebikes and escooters are far more likely to catch fire than phones.

The point is if you’re not emptying your dryer lint filter every use; if you’re not getting home pest inspections every six months and putting down rodent traps or baits; if you’re not getting your heating-element devices professionally checked regularly; if you’re not storing your ebike well away from flammables; etc., then worrying about phone battery fires is ridiculously out of proportion.

I’ve got a colleague who says she’ll never buy an electric car because of the fire risk. But then she drives around in her gas car which is 8,000%+ more likely to catch fire.

If you’re still paranoid, keep the device in a non-combustable container away from flammables, and near enough to a smoke detector. It’s easy to setup something that if the phone catches fire it’ll just burn itself out.

At all? What do you believe the fire hazard is then?

Use a smart power switch.

Battery level drops below say 20% - turn switch on and start charging.

Battery level goes above 80% - turn switch off.

For Android, you could use something like the Tasker app to do the monitoring and switching.