The battery doesn't cease functioning after 3-4 years. The benchmark says it should have 80% capacity.

It's also not really that expensive to have phone batteries replaced. Apple will do it for $120 including the battery for their flagship models that cost over $1000. Cheaper for lower end models.

I can't take any arguments seriously that claim these phones are becoming e-waste after 2.75 years. Battery replacement is a common process.