This unit has a new battery.

This APC BACK-UPS 250 Battery Backup is the perfect solution to protect your devices from power outages and surges. Designed to work with 120 V voltage compatibility, this battery backup by APC ensures that your electronics stay safe and powered during power disturbances.

The model number, BK250, indicates that it is a high-quality battery backup from the brand APC, a trusted name in power protection. With this product, you can be confident that your computers, tablets, and other devices are safeguarded against power-related issues.