For me, it's no replaceable batteries. Anything with an internal battery has a finite span of usefulness. There's no real excuse for making batteries inaccessib

For me, it's no replaceable batteries. Anything with an internal battery has a finite span of usefulness. There's no real excuse for making batteries inaccessible, other than forcing people to rebuy. A great example is Tile, little tracking tags for your keys. I bought one, and in a year the battery died, just in time to get an email from the company offering a 10% discount on a new one.