Lithium Battery Online Non‑destructive Inspection Equipment segmentation by type distinguishes four principal technologies: ultrasonic testing (UT), X‑ray computed tomography (CT), infrared thermography (IRT), and eddy‑current testing (ECT). UT employs high‑frequency sound waves to detect internal delamination, voids, or electrolyte leakage, offering depth penetration up to several centimeters and suitability for cylindrical and pouch cells. X‑ray CT provides three‑dimensional volumetric imaging, enabling precise localization of electrode misalignment, metal whiskers, or manufacturing defects, albeit with higher capital cost and safety considerations. IRT captures surface temperature gradients during charge‑discharge cycles, allowing rapid identification of hotspots that correlate with internal resistance anomalies; its speed makes it valuable for high‑throughput lines. ECT exploits electromagnetic induction to sense conductivity variations in metallic components, useful for detecting plating defects on current collectors. Each technology contributes distinct value propositions, influencing overall market size through differential adoption rates, cost structures, and regulatory drivers across battery manufacturers. Consequently, the aggregate market valuation reflects the weighted sum of these technology‑specific deployments.