Not everybody is skilled enough, or even physically able, to do what is sometimes extremely convoluted. So my phone, that’s intentionally software unmaintainable, will have a single replaceable part. The modern smart phone is a lot closer to an evolution of the digital organizer than a mobile phone. The main reason we have gone to ‘fixed’ Philips Norelco Shaver batteries is so that they can sell you a whole new device every three years, even if everything but the battery is fine. By turning off your phone while walking through a shopping street you can prevent being tagged and tracked by dozens of shops. Phone manufacturers produce two SKUs of the same phone for different markets.
It’s 2 years old, the battery barely lasts 12 hours and it’s declining fast… but this one is sealed shut. Either I crack it open, permanently carry around an external battery pack, or I replace it entirely, and all of those options suck. That’s slowly changing, samsung promise 4 years of software support for core devices and I’d expect 1 or 2 battery replacements in that lifespan. For phones it is only useful for iPhones, all Android devices expire due to lack of software updates long before the battery wears out. It’s really simple to add some digital certificate to the battery that can confirm its authenticity. And really simple to store that information on the phone in some secure storage .
I am often trekking or hiking for a week or more, with no access to electricity to recharge my phone, that I use for its mapping application. I used to have a couple spare batteries, much lighter than carrying around a power bank. And safer, as I knew exactly what power I had left, just counting the remaining batteries. What I imagine will happen is that the back of the phone will probably be a single unit containing the battery, wireless charger, and probably a few other things like the USB connector.
A new, high-end manual razor is meant to duplicate the old school, hot-towel-shave experience. The S9000 Prestige’s trimmer, most often suitable for sideburns, Philips Norelco Shaver is a separate attachment that’s easy to lose. James has been using the Series 7 to shave a portion of his face since first testing for this guide in 2020.
Temperature cycling causes tiny kernels of tin to change phase and return back, which eventually causes surface corrosion as the tin flakes off, but that takes years if not decades. Last year the battery life had started to make the phone unusable. So I bought a new battery for $9 from EBay, replaced it myself, Philips Norelco Shaver and am still using that phone. Still works like new, except the iOS version is a bit old and isn’t updated anymore . Ryobi’s ONE+ tools have used the same battery form for over 25 years. They put the over-discharge protection into the lithium-ion batteries so they can work in the old blue and orange tools.