OPTI-UPS ES1000 / 1000ES Replacement Battery Pack for UPS

Replacement battery pack specifically for the OPTI-UPS ES1000 and 1000ES UPS models. This set restores the original backup capability of your ES1000 / 1000ES unit and is intended as a direct replacement for the factory battery assembly. Use this battery set when the UPS indicates end-of-life or reduced run time to return the unit to normal operation.