Document outlines preparation for establishing a Task Force on Swappable Battery under GRPE. Identifies sustainability aspects including on-board battery use as renewable energy buffer, battery cost and separate sale/lease models, vehicle lifespan exceeding battery life requiring service exchange, and battery replacement due to technology evolution. Lists issues for WP.29 framework covering vehicle approval with different battery pack numbers, separate battery approval, safety measures during swapping, attachment functionality, durability requirements, battery history tracing, cyber security, battery failure alerts, software updates, battery lifetime definition, and compatibility checking between battery and vehicle combinations. Proposes establishment of new Task Force under GRPE with collaboration among existing groups, two-step approach for identifying work items and drafting Terms of Reference, and timeline for five Task Force meetings from December 2026 to April 2027.