Bigger batteries would be so worth it

The achilles heel in the lifecycle of a lot of rechargeable devices is battery life. Lithium Ion batteries diminish steadily, often in 3 years they are about half of what they were when new. For a lot of products, I think a reasonable solution would be just provision them with a bigger battery to start. Instead of making each generation of mobile phones a bit thinner, use that space for more battery.

I was a devoted user of the Jabra Elite 65t earbuds for 5 years. The main reason I replaced them was battery degradation. When they were new, battery life was good, not great. I use them in large part for conference calls, so maybe 4 hours, with the case providing about 8 more hours. So I could often get by charging them once mid-week. By the end, I had to charge them every day, and on heavy days, they needed a top-up.

The replacement Soundcore A40 are a decent upgrade, but not all that huge, for being a 5-years-later product. The one area they really shine, though, is battery life. Out of the box, they get 6-8 hours battery life, and the case has 4X charges (vs 2X for Jabra). They almost always last all week.

Like a Kindle, even when you get the low battery warning, you probably easily have a day left (including what's in the case). It's great, more than I really need. But the beautiful thing is, even if it degrades by a full 50%, it will still be very, very good!