Answer:

Most toilets are exposed to condensation, harsh cleaning agents, and the occasional errant toddler who needs to work on his aim. Except for the downward facing and angled slot for the battery activation tab, the unit has been sealed to fully protect it. Similar to Netflix, the user receives an envelope in which the LeakAlertors may be returned for a brand new battery, the latest software upgrades, and a new enclosure – all for about the same price that a replacement battery could be purchased from a retail store. The old plastic enclosures are recycled and the batteries are disposed of properly.