right now i would not use it . it's a smart battery and in a few days it will discharge to storage voltage if the chip is still working ( the full green LED'S should not be lit ) . then you could charge the water soaked battery up and evaluate the battery . now if it was me i would put it aside or just toss it . it's been under water and i would not trust the battery . if this battery was used in a RC car or truck , not a problem but up in the air , no way . for me a $90 battery is not worth the price of my drone .
fly safe