> Last as in "works" is a very low bar, they are going to have severely reduced capacity, which also affects performance. Batteries tend to degrade to about 85

> Last as in "works" is a very low bar, they are going to have severely reduced capacity, which also affects performance. Batteries tend to degrade to about 85% quickly and then spend a long time at that capacity. Couldn't tell you why. A USB battery is a more useful thing to have, for instance because you don't have to turn off the phone to use it. > Is this[1] what easy looks like? For something you'd do every 2-3 years, sure. He's put in some extra steps in that video I think.