Which type of battery is most commonly used in Remote Piloted Aircraft Systems (RPAS)?

Lithium Polymer (LiPo) batteries are the most commonly used type of battery in Remote Piloted Aircraft Systems (RPAS) due to several reasons. They offer a high energy density, which means they can store more energy relative to their weight. This is crucial for RPAS, as weight plays a significant role in flight performance and efficiency. Additionally, LiPo batteries can provide high discharge rates, which allows for rapid acceleration and the power needed for lifting the aircraft effectively, particularly during takeoff and maneuvers.

LiPo batteries also have a relatively low self-discharge rate, meaning they can retain their charge for a longer period when not in use, which is beneficial for operational readiness. Moreover, they can be configured in various shapes and sizes, allowing manufacturers to design them to fit into different RPAS frameworks efficiently.

In contrast, the other battery types mentioned have limitations. Nickel Cadmium (NiCd) and Nickel Metal Hydride (NiMH) batteries are generally heavier and do not offer the same power-to-weight ratio as LiPo batteries. Lithium Cadmium batteries are not commonly used because cadmium is toxic and presents environmental and health risks. Therefore, Lithium Polymer batteries are favored in the RPAS industry for their performance characteristics and versatility.