How do you replace the battery

@perryblank21952 not specific a battery replacement but the "teardown" on here Aiper Seagull Pro: Teardown should help you to get to it. Step 15 last picture shows you the battery.

While you work on your pool cleaner, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!