Best Power FERRUPS FES 3.1KVA UPS Replacement Battery Set

Complete replacement battery set for the Best Power FERRUPS FES 3.1KVA UPS. This kit is designed specifically for the FERRQPS FES 3.1KVA model to restore the unit’s backup power capability. Supplied as a full battery set for direct swap into compatible FES 3.1KVA UPS systems—ideal when the original batteries need replacing.