"Or better, to drop it in a bucket of water."
I think you misspelled "sand".
A fully charged lithium battery has significant quanties of pure lithium inside it and mixing with water is going to result in a bad day if you do it whilst airborne.
On average an aircraft fire which can't be put out by cabin crew will down the plane if it is further than 11 minutes from being able to land.
Biting the hand that feeds IT
