@mischievoustomato
Modern li-ion batteries in modern tech get stressed out more than older ones.
Current li-ion are build with much smaller tolerances, at the edge of bursting out in flames by themselves (see Samsung Note 7), just so they can put as much energy in as small of a volume as possible.
And tech simply use up more power, drawing more amps during usage, and then you pump more amps during recharge, which also stresses out batteries far more. A smartphone can fast charge with multiple amps of power, while for maximum battery life you wouldn't want to push more than 500mA.