Yeti 3000 Lithium upkeep questions

dannymonk

I purchased a Yeti 3000 Lithium Portable Power Station with WiFi and two Boulder 200 Briefcase back in 2018 to use after hurricanes (I live in Miami, FL) thankfully I haven't needed to use it. I've kept it plugged in though and it seems to be charging well. I had an issue with the Yeti Power Supply cable but it was replaced and seems to work fine.

This year seems like it might be pretty active Hurricane wise so I decided to do a check up on my Yeti. I'd like to know if it's still good after all these years. Should I do something to test it? Do I need to replace the battery? Is that even possible?

Sorry for all the questions, thank you for any help. :)