The APC RBC14 Replacement UPS battery kit suitable to replace the APC RBC14 replacement battery cartridge from Critical Power Supplies. For use with APC UPS Models * APC Matrix MX3000 * APC Matrix MX5000 All Critical Power Supplies replacement UPS battery kits are assembled using high quality sealed lead acid batteries manufactured by CSB which are fitted by APC in both new equipment and also replacement battery cartridges. Please note: APC & RBC are registered trade marks of American Power Conversion Corporation and Critical Power Supplies Ltd use them for reference purposes only.