Where can I get a quality s8 battery?

[Yeruchum Dear]

I've replaced my S8 battery twice, both were bad. I need to get a good quality replacement and a battery case from a reputable seller.

 

[mustang7757]

Hi, welcome!
You can try here :https://www.ifixit.com/Store/Android/Galaxy-S8-Replacement-Battery/IF355-000

 

[Rukbat]

Any battery you get will be going on 3 years old. If it's just been sitting on a shelf for 3 years, it's probably not in very good condition. (Lithium batteries self-discharge. Most of them will have discharged close to 0 by now.)

You could try uBreakiFix if you're in the US. Or Samsung itself.