Document summarizes ongoing revisions to minimum performance requirements (MPRs), lifetime, and metric requirements for heavy-duty vehicles under GTR 25 Optional Annex 4. Proposes modifying lifetime thresholds (years and kilometers), adding intermediate verification at 5 years to enable early detection of battery-degradation risks, and segmenting MPR thresholds by vehicle category and mission profiles for categories M₁-M₃ and N₁-N₃. Presents vehicle operation data from Chinese manufacturers, capacity retention analysis, energy throughput metrics, and feasibility assessments of 5-year MPR limits with proposed MPR values of 75% covering 98% battery-durability performance.