A remote PIC notices that the drone's telemetry shows battery voltage dropping faster than expected at 50% charge. What is the most appropriate response?

Why →Abnormal battery discharge rate is a warning sign of a degraded or failing cell. Continuing the mission risks an in-flight power failure with no warning, a significantly greater hazard than ending the flight early. The appropriate response under the ADM (aeronautical decision-making) framework is to detect the anomaly, estimate the risk, choose the safest option (return and land), and evaluate. "Use remaining battery efficiently" inverts the risk calculus.

The trap →Reducing throttle might extend remaining flight time but does not address the root cause: an anomalous discharge rate suggests cell degradation, swelling, or internal shorts that can cause rapid failure without further warning. Using remaining battery efficiently maximizes risk exposure time.

Field note →Know your battery's normal discharge curve before each flight. A healthy LiPo at 50% charge should discharge at a consistent rate. Abnormally rapid drop from 70% to 50% in less time than expected from 100% to 70% is a red flag. Land, mark the battery, and inspect before reuse.