Yes! Additional or replacement batteries can be purchased from Norvado or a battery outlet (i.e. Batteries Plus) and replaced by you if so desired. To do so, you will need to determine the battery type and size by locating the UPS, usually where the fiber line enters the premise and near a power breaker box, and noting the battery specifications that is currently in use. When you wish to begin using the new battery, simply remove the old battery, insert and connect the new one.
To test the battery in the UPS, unplug the UPS from the A/C outlet. The battery should begin supporting hardwired, non-cordless phones, and television and internet service(s), if applicable. The UPS may have visual and/or audible alarms to indicate the status and condition of the unit.