Baterie UPS 12V/ 24AH Yuasa NPL24-12I, 10-12 years, Long Life
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https://www.yuasa.co.uk/batteries/industrial/fire-and-security/npl24-12i.html
Capacity at 20-hour Rate (Ah) 24
Capacity Ah (20-HR) 24
Length (mm) 166
Width (mm) 175
Height (mm) 125
Total Height (mm) 125
Weight (kg) 9
Nominal Voltage 12
Capacity Ah 24