Yuasa Yucel SLA batteries - Yuasa Y2.1-12, The Yuasa Y2.1-12is a 12V 2.1Ah lead acid battery designed for standby use. This battery is waterproof. The AGM principle relies on the use of blotters between the lead plates in which the acid is soaked. The AGM technology enables you to have a more efficient battery for a wide range of applications.Applications: robotics engineering, alarms, backup systems, medical devices, telecommunications, toys, signalling, IT systems. Yuasa Yucel Y2.1-12 Valve Regulated Lead Acid SLA Battery 12V 2.1Ah