Yes, both pads and batteries expire and will need replacing. It is common for them to have a shelf-life which is the amount of time they can be stored without being used. Batteries also have a ‘standby life’ which is the amount of time they can be used once installed. This varies depending on the manufacturer. Batteries will typically power a defibrillator for between 4-5 years.
Electrode pads are disposable, single-use items and cannot be reused. They may be stored for some time before use and their ‘shelf life’ ranges from 2-4 years. When the shelf life or standby life has expired, replacement AED pads or replacement defibrillator batteries will need to be purchased.