Global UAV Battery Market Assessment, By UAV Class [High-Altitude Long-Endurance (HALE) UAVs, Medium-Altitude Long-Endurance (MALE) UAVs, Tactical UAVs, Small UAVs, Others], By Battery Chemistry [Lithium‑Ion, Lithium‑Polymer, Fuel Cell, Others], By Region, Opportunities and Forecast, 2018-2032F