Drone batteries primarily use Lithium Polymer (LiPo) for lightweight, high-power performance in hobby drones, and Lithium-ion (Li-ion) for longer flights in commercial models, offering a balance of energy and stability. Older or specialized drones might use Nickel-Metal Hydride (NiMH) or Nickel-Cadmium (NiCd), while advanced UAVs sometimes use Fuel Cells for extended endurance, but LiPo and Li-ion dominate due to their superior energy density.