Hey @userBjdmYdwmqu ,
It sounds like your battery is swelling. I would contact 1-800-SAMSUNG or visit https://www.samsung.com/us/support/service/locations/ to find an authorized samsung repair location by you. Call and see if they're open and will replace the battery on your S8 Active.
Best of luck,
Be sure to click " ✓ Accept as Solution" when you find an answer that works for you.
Your battery is most definitely swelling! This is not good whatsoever. A swollen lithium battery can lead to explosion or fire. Please remove it from your phone immediately. Better safe than sorry. Also, do NOT puncture that battery with anything. There are several videos on YouTube demonstrating just what happens when cell phone battery swells, and also what happens when they are punctured. Please be safe.
Thank you for reaching out, I can certainly understand reaching out experiencing these symptoms and I would like to assist you further on this. Could you please provide me with your model and IMEI number in a private message? https://bit.ly/2SUXRar