If you have ever lost work because of a power outage then this accessory is perfect for peace of mind. This is a working UPS (Uninterruptible Power Supply) with working Battery that will let you keep working the next time the power goes out. It also has a bank of surge protection outlets for less critical devices. Model: Backup_UPS ES 500 It has a field replaceable battery sold in local stores and are easy to find. This unit currently has a genuine APC battery that was pulled from another working UPS model 650. I charged and tested the battery with an external battery checker before listing it. Downsizing and getting rid of this as it has been sitting on a shelf for the past 2 years. Priced to sell. Costco sells the smaller model of this for $65 with less outlets and shorter battery duration. Vendor and Specification: https://www .apc. com/shop/us/en/products/Back-UPS-ES-500/P-BE500U Location: 1/2 block from Lochside Elementary on Royal Oak Drive. Will pull Ad after it as sold.