Hopefully enterprising chaps in garden sheds will work out how to refurb batteries as the time approaches.
There is or was a chap in the UK who was a dab hand at reconditioning Honda hybrid batteries and i’ve seen youtube videos of recon packs via mail order on an exchange basis in the USA for Toyota hybrids which a confident handy home mechanic would be quite capable of refitting into their own car, for all i know for both types there’s a vibrant cottaging 
industry busily doing this valuable trad, there could be a good living to be made reviving duff battery packs in the future.
By the way Maoster, after finally admitting defeat and buying into smart phone, i ended up with a CAT S41 tough phone couple of years ago, the battery of which lasts me 3 to 5 days in normal use and around a month on standby type use when i’m on holiday.
Android not as easy to use as iphone i’m told but even modern tech avoiding me is finding me way about it.