s10 battery and power question

[quick_q]

I have a galaxy s10 that took a swim in chlorine water. I have to get some things off the storage but it wont turn on anymore. I did the drying out and cleaning the contacts. Those that know, if it's the battery that's bad, can this turn on with the battery disconnected and just the power attached, or does it need to detect the battery is attached as well?