On one of my previous trips, I slightly submerged my scooter in a deep puddle, and water managed to penetrate even the hermetically sealed battery. In this video, I'll disassemble a flooded battery and determine whether it can be restored.
You'll see with your own eyes how quickly electrocorrosion and electrolysis occur.
Warning! Exactly 20 hours elapsed between the time of the flood and disassembly.
Always observe safety precautions when working with lithium batteries!