Baterie UPS 12V/ 7AH T2 Yuasa NP7-12L-TW, 3-5 years---https://www.yuasa.co.uk/np7-12l.htmlCapacity at 20-hour Rate (Ah) : 7Capacity Ah (20-HR) : 7Length (mm) : 151Width (mm) : 65Height (mm) : 97.5Weight (kg) : 2.2Nominal Voltage : 12Capacity Ah : 7