This is why I still use my Thinkpad W520. If I don't need the battery I just take it out until I need it. I hate that we got rid of removable batteries in basically all devices.
I still miss my Pebble 1 but my Amazfit Bip fills the void a bit. It's got amazing battery life and a pretty good screen. I really miss the epaper display of the Pebble though. I don't exactly know why either.