this post was submitted on 16 Jun 2023
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That is something that would be very hard to legislate. Especially since battery lifetime is dependent on a variety of external factors (charging-style, temperature of the device, luck). Build quality certainly also factors in, but even the best battery won't survive a 10 year old regularly overheating their phones with games and charges it for the entire night. I would love to see OEMs implement nice things like "capacity settings", where you can set your device to stop charging at 80% and show it as 100%.
This is exactly what happens in cars. Usually, you have an 8 year warranty for your battery.
Yes, a phone is smaller. Less space and weight. But 5 years are less as well. The electronics can track everything, shut the phone down if it's too hot (and not when it's so hot that it's in danger to burst into flames like it is now). Adjust the charging speed by temperature. Do not charge the battery to 100 %. ...
All things the manufacturer can influence.
On a Phone, people are already conditioned to have their phone work all the time, no matter what you do to it, and there is an advertised Maximum Battery Capacity.
People don't do the 80/20 rule on Phones because that's outrageous to them.
But EV Manufacturers have built in the 80/20 rule into their cars. When you do long distance EV trips, the Route Planner will automatically tell you where the next charger that you will arrive at 20%-ish battery capacity will be and route you there. And the car will stop charging itself at 80% and you'll be ready to go.
Phones on the other hand, tell you "Hey moron, I'm at 30% you should charge me!" And most phones don't have a Battery Protection setting to cut charging at 80% (Samsung added this about a year ago to their phones)
If you shouldn't charge over 80%, why don't manufacturers just report a battery at 80% its "real" capacity as 100% charged? Same for the lower margins. It would probably make things easier for people to understand.
Because then people would be up in arms about the lower battery life. People want a phone that can go all day without charging. And they never slow charge their phones overnight.
It's a product of people just being absolutely stupid.