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I change the battery every 4 years, and try to minimize the number of cycles on it. I avoid apps and downloads as much as possible, because life was and still is fine without them, and cycling the solid state memory with downloads can wear it out causing catastrophic failure. It stopped getting updates long ago. I wouldn't call them cheap, just paid for in part by the phone bill.

Yes, you can change the battery. At least in theory.
I tried to replace the battery on my wife's Pixel 6, and I snapped one of the brittle ribbon cables when I opened it. Turns out, you can't just replace the ribbon cable, you need a whole new screen. So it wasn't worth repairing.

I've replaced the battery on some of my phones; but in most recent years I had a couple $40 phones, which were already annoyingly slow, had the batteries die (actually, they died by swelling up, not by "failing to charge") and I just decided to get a new, fast phone WITH a battery, for $50. I noticed the speed boost right away, and felt I made the right decision.

Because: replacing the battery isn't like opening the battery door on your TV remote control and popping in 2 fresh AA batteries. If only!
No, you need special equipment, you have to carefully open the thing, it's not as easy as removing a bunch of phillips screws on the back of the case. And once inside, you have to unplug and unscrew all sorts of things because everything is packed in like sardines. Oh, and the battery is held in place by some serious glue -- it's difficult to get it out, without ripping the Lithium battery open (and starting a fire).

These phones are NOT designed to be serviced at ALL, not even something as straightforward as a battery replacement.

BTW, if you feel no need for a smartphone or apps, because "life was and still is fine without them", why own a smartphone at all? They do make dumb-phones, you know. Phones that don't have Android, that only do calling and texting, etc.

Yes, you can change the battery. At least in theory.
I tried to replace the battery on my wife's Pixel 6, and I snapped one of the brittle ribbon cables when I opened it. Turns out, you can't just replace the ribbon cable, you need a whole new screen. So it wasn't worth repairing.

I've replaced the battery on some of my phones; but in most recent years I had a couple $40 phones, which were already annoyingly slow, had the batteries die (actually, they died by swelling up, not by "failing to charge") and I just decided to get a new, fast phone WITH a battery, for $50. I noticed the speed boost right away, and felt I made the right decision.

Because: replacing the battery isn't like opening the battery door on your TV remote control and popping in 2 fresh AA batteries. If only!
No, you need special equipment, you have to carefully open the thing, it's not as easy as removing a bunch of phillips screws on the back of the case. And once inside, you have to unplug and unscrew all sorts of things because everything is packed in like sardines. Oh, and the battery is held in place by some serious glue -- it's difficult to get it out, without ripping the Lithium battery open (and starting a fire).

These phones are NOT designed to be serviced at ALL, not even something as straightforward as a battery replacement.

BTW, if you feel no need for a smartphone or apps, because "life was and still is fine without them", why own a smartphone at all? They do make dumb-phones, you know. Phones that don't have Android, that only do calling and texting, etc.

I just pop the back off, battery falls out, put in a new one, snap the back back on. It is a slow phone at times, no multi tasking is best, but I just wait to use the desktop if my phone can't. 

I broke a ribbon cable on an Ipod nano attempting to change the battery. I would have attempted to solder on tiny jumper wires if I needed it fixed, but had alternatives for no extra cost or trouble.