Can I add external batteries to 5P, 5S, or 5SC?

The 5P, 5S, and 5SC UPS units do not have the capability to add external battery modules. The only 5 Series UPS that allows for the use of external battery modules is the 5PX found here - https://www.eaton.com/us/en-us/catalog/backup-power-ups-surge-it-power-distribution/eaton-5px-ups.html