Battery As A Service Market Size & Share, By Battery Ownership Models (Battery Purchase, Battery Lease, Battery Subscription), Energy Storage Capacity (Less than 50 kWh, 50-100 kWh, Over 100 kWh), Application (Electric Vehicles, Stationary Energy Storage, Portable Electronics) - Growth Trends, Regional Insights (U.S., Japan, South Korea, UK, Germany), Competitive Positioning, Global Forecast Report 2025-2034