On September 28th and 29th one of the UPSes that serves our Santa Rosa datacenter and colo facility will have all of it’s batteries replaced. (Over 4,000 pounds of them!) We will also be taking the opportunity to install a battery monitoring system in this, our oldest, UPS. Once installed, the battery monitoring system will allow us to individually monitor each battery in the UPS allow us to predict pending failure as well as reliably detect other faults. Service will not be interrupted, this is a fully scripted event coordinated with our vendors.