My spark flew away on its own yesterday and smashed into a building. I've logged a repair case with dji, but I'm wondering if anyone knows how I safely dispose of the battery which is pretty smooshed and no longer in its housing.
No, they do not want the battery, due to risk of fire.
Mine just went diving in my swimming pool, just sent it back under DJI Refresh.
They specifically state not to return a water damaged or squooshed battery.