Do you prefer tail lights with built-in, USB-rechargeable batteries, or ones with standard replaceable batteries (AA/AAA)? The built-in, USB-rechargeable batteries are certainly convenient, and I'm pretty sure I'll break or lose a light before the battery fails, but it also seems like an LED is going to last a lot longer than the battery so if I really want to minimize long-term cost and plastic production I should use rechargeable AA/AAA batteries. The ones with built-in batteries do seem better sealed against weather (unsurprisingly). Any other reasons to prefer one over the other?