“If they could, they would have done it 20 years ago or recently, but in reality, that kind of battery tech you wish, is decades in the future, if ever. A solar panel which one can wear might be the way to go for recharging smartphones. Just make it ‘invisible’ but wearable.”
I use my “phone” a lot. typical day is about 40% of battery but can be more. If I sit on the couch I put my phone down on the wireless charger next to me. Same when I go to bed. The Always On screen serves as my bedside clock. No big deal.