system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How do Jedi recharge lightsabers?

Do they have lithium batteries? Do they plug them in to recharge?
gpt
There is a recharge port. 

In general there's next to none energy loss when it's just idle so one can last for a very long time, but extensive use, like just cutting things for 24 hours a day might actually drain the power cell requiring a recharge. In general these events are rare, so charging is almost never actually portrayed in visual medium. You can only catch mentions of it here and there in the novels.