The battery is a small sealed lead acid battery for FiOS backup. It was shipped USPS. I found the package in our mailbox today. It was in a bubble pack shipping envelope. Inside the envelope was a small cardboard box. Inside the box was the battery, wrapped in bubble pack, but with enough room to shift around about 3/4", you could hear it slide when you tilted the box. I thought it was interesting there was no sealed plastic bag used in the packaging. They sure have faith in the "sealed" aspect of the lead acid battery.