HP R1500 G2 UPS Battery Kit 418401-001. 

Battery type - VRLA Sealed Lead Acid Battery.
Voltage- 6V
Capacity Rating- 34Wh
Dimensions- 151mm x 34mm x 94mm
Weight 1.32kg

Brand new in box.

Please note that this has been in storage for some time. The outer packaging may be damaged or may have been opened (please see the pictures or ask if you require further details.