Quick overview from the supplier:
Baterie UPS 12V/ 7.5AH Yuasa NPW45-12-TW, 3-5 years
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https://www.yuasa.co.uk/npw45-12-npw-45-12.html
Capacity Ah (10-HR) 6.6
Capacity Ah (20-HR) 7.5
Length (mm) 151
Width (mm) 65
Height (mm) 97.5
Weight (kg) 2.7
Nominal Voltage 12
Capacity Ah 7.5
