"Printronix's PrintCart is the only mobile printer-power solution proven to last through your demanding work shifts. The Advanced Power Management (APM) System is designed to save you time and money. The longevity of the battery is extended by protecting from deep discharging and short charge cycles. Discover how easy the PrintCart is to use. Just plug in your wireless terminal and thermal printer and you are ready to start saving today. Allows continuous operation for up to 20 hours, 12 hours under heavy use. Accessories available."