The HCFC-142b for Lithium-ion Batteries segmentation by application isolates four principal demand drivers. Electric vehicles (EVs) dominate with an estimated 45 % share, reflecting the intensive thermal‑management systems required for high‑energy‑density packs in passenger and commercial fleets. Energy‑storage systems (ESS) contribute roughly 30 % as grid‑scale installations adopt liquid‑cooling loops to sustain long‑duration discharge cycles, where HCFC‑142b’s low global‑warming potential offers regulatory advantages. Consumer electronics account for about 15 % of the market, driven by compact smartphones, laptops, and wearables that rely on micro‑channel cooling to mitigate hotspot formation. Finally, industrial power tools represent the remaining 10 %, where portable equipment benefits from lightweight, high‑efficiency refrigerant circuits. Each application segment adds distinct volume and pricing dynamics, collectively shaping the overall market size and growth trajectory for HCFC‑142b in lithium‑ion battery thermal management.