[Compatibility] ONLY Compatible with APC UPS models BR1000G, BX1350M, BN1350G, BX1000G, BX1300G, SMT750RM2U, SMT750RM2UC, SMT750RM2UNC, SMT750RMI2U, SMT750RMI2UC, SMT750RMI2UNC, BX1500M, BR1500G, BR1300G, SMC1000-2U, SMC1000-2UC, BR1500GI, BX1500G and select others. This is a SafeAMP® branded battery and is not created or sold by APC.[Compatible UPS Battery] Length is about 8 inch. Width is about 6 inch. Height is about 3 inch.[Superior Performance] Composed of a pair of 9.5Ah 12V batteries. The SafeAmp UPS Battery is a direct replacement for RBC124. Will also replace RBC123.[Premium Quality Battery] Our SafeAmp Compatible Replacement Battery Cartridges (RBC) are tested and certified for compatibility to restore the performance of your UPS to original specifications[Technical Information] 9Ah, 24V DC.[Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you!