My brother almost died from swallowing a battery when he has a toddler. He was extremely lucky it didn’t open in his stomach, otherwise he’d be dead now. Some doctors have even postulated that some of the (extreme) behavioural difficulties he has had all his life stem from the lithium that may have been absorbed at such a young age.
Thanks mate. I didn’t mean to make this about my story, but rather mention what the consequences of your grandfather’s actions could be though.
I hope he comes to his senses or something.