APC Smart-UPS-1400 SU1400R2IBX120 battery replacement
Replacement APC Smart-UPS-1400 battery pack for the SU1400R2IBX120 a 2U line interactive rack mountable 1400Va computer battery back uninterruptible power supply at low price direct from warehouse

There are a number of Smart-UPS-1400 versions of uninterrupted power supply, the best way to check you are ordering the correct pack for yours is to look at the code that will be written on the reverse of the system, in this case it will be SU1400R2IBX120, if it states something else then put that into the search bar above to ensure you are purchasing the correct set for your system

• APC Smart UPS 1400 battery 
• SU1400R2IBX120 battery

easy to fit
Hot swap capable
Recyclable

While its not always possible because of the urgent requirement of getting your system up as quick as possible it is best if you can spare the time after installing the batteries to run up without any load at least until the batteries indicate they are fully charged, longer if you can, this really helps to reset the system to the new batteries much better and may extend the battery life in the long run

Chemistry of battery are sealed lead acid
Voltage of battery is 12v
Capacity of battery is 7Ah @20-Hr
There are four batteries in this set for the APC Smart-UPS-1400 SU1400R2IBX120 system the size of each one are as laid out below
Length = 151mm
Width = 65mm
Height = 94mm