This white paper sets out the operational and environmental problem created by battery-powered IoT asset tracking at scale. It explains how hospitals, warehouses, manufacturing sites, and other asset-rich environments increasingly depend on smart sensors and trackers, but face high maintenance costs, battery disposal issues, downtime, and limits on device design. The paper compares common tracking technologies such as BLE, UWB, RFID, LPWAN, and cellular, then presents energy harvesting, particularly indoor photovoltaic power, as a practical route to battery-free asset tracking for long-life IoT deployments.