40 AMP Lithium Battery AC Computer Cart with Drawer Rubbermaid has designed AC powered Computer carts which are perfectly suited for operating a smaller PC units, such as mini pc’s, LCD monitors, thin clients, notebooks computers, which can be placed under work surface. High Competence Computer Cart with 40 AMP Lithium Iron AC powered (LiFePO4) Keyless Lock Drawer and Battery. Unit features internal storage for small form CPUs, 16 inch height adjustment, single drawer with PIN code access, keyboard light, fully adjustable keyboard tray.