What is a recommended practice before flying with lithium batteries in cold conditions?

• A.Store the batteries outside so they match the air temperature
• B.Charge the batteries to maximum voltage outdoors in the cold
• C.Keep the batteries warm and allow them to warm to a suitable temperature before takeoff

Why

Warm batteries deliver closer to their normal capacity and hold voltage better under load. Keeping them insulated until launch and warming them as the manufacturer directs protects performance.

Source: FAA-G-8082-22 Ch. 8 · ACS knowledge area: Determining the Performance of an sUAS · From the Loading, Performance & Airport Operations practice bank (PER-038).

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More Battery warming before flight questions

• What happens to a multirotor sUAS as its total takeoff weight increases?
• Adding a heavier payload to an sUAS will most directly cause which effect?
• Why must the center of gravity (CG) remain within the limits set by the manufacturer?
• Before takeoff, how should a payload or attached equipment be secured?
• Under Part 107, what is the maximum allowable takeoff weight for an sUAS, including everything attached?