Batteries begin to expire as soon as they’re manufactured. Hence, the expiration date on them is based on this. Shelf life changes between sizes and types of batteries, as well as their storage. So store your batteries in a room temperature and dry place and always check their date.
Bleach loses some of its effectiveness in 3 months. So every few months or so, throw away your bleach. The same goes for household disinfectants, like Lysol.