There's a lot of 18650 compatible flashlights and stuff, but some of them have the battery sealed inside. I have a couple of bike lights and flashlights that ha

There's a lot of 18650 compatible flashlights and stuff, but some of them have the battery sealed inside. I have a couple of bike lights and flashlights that have this issue and I've cracked them open to replace the batteries, but it's not a regular person thing to do.