Amstron two 6 Volt 7Ah battery equivalent to APC RBC18 is designed for use with PS250, PS250I, PS450, PS450I, SU5005, BAY450. These VLRA sealed lead acid battery uses a state of the art, heavy-duty, calcium-alloy grid that provides exceptional performance and service life in both float and cyclic applications. • UL recognized under file number MH47341 • Connectors and Fuse not Included • Meets or exceeds the original manufacturers specifications. • Replacement products are non OEM products guaranteed to meet or exceed original manufacturer specifications. Brand names, company name, part numbers, illustrations, and images used herein are for reference purpose only. APC and the APC Family logo are registered trademarks of APC™. APC has not sponsored or endorsed any products seen on AtBatt.com and APC is in no way affiliated with AtBatt.com