Just had to replace the batteries on my mouse.
It occurred to me that if you were a battery and you turned out to be claustrophobic, life after the supermarket would be one unending scream of terror. After adjusting to life in the kitchen drawer, you would be taken out and placed in a small, dark cavity. There would be no room to move, no air to breathe, and the lid of your coffin would be screwed firmly into place. BURIED ALIVE!
Imagine if you thought you were up to the job, like that guy I heard about who got through his submariner training no problems at all, and then when he was finally in the submarine and heading out of Sydney Harbour, cracked and was overcome by the howling heebie jeebies. They had to turn the sub around and bring him back home, and that was the end of his submarine career.
Not to mention that if you were a battery and you were using up your energy with a perpetual shriek, you wouldn't last long.