The Bosch TB100103 Battery is a 12-volt, sealed lead acid (SLA) rechargeable alarm battery designed for use in security and fire alarm systems. The battery is designed to provide a reliable source of power to maintain the operation of the alarm system in the event of a power outage. It has a capacity of 10 Ah, which provides enough power for up to 24 hours in standby mode. The battery is housed in a durable steel case and is maintenance-free. It is designed for indoor use only and comes with mounting hardware for easy installation. It is UL listed and tested to meet safety and performance standards. It features a 3-year limited warranty.