lithium battery cold temperature

• Does Lithium Battery Degradation at –20°C Reduce Two-Way Radio Transmit Power?

  

  Jul 01, 2026

  Winter field operations, polar expeditions, high‑altitude rescues – in these scenarios, two‑way radios are the lifeline for mission success and personal safety. But when the mercury plummets to –20°C, a critical question arises: as lithium‑ion battery performance degrades in the cold, does the radio’s transmit power drop as well? The short answer is yes. This is not just a theoretical concern – it is a physical reality repeatedly verified in extreme cold environments. In this article, we will examine how low temperatures affect lithium batteries and how that impact translates directly to transmitter output power and effective communication range.   1. What Happens Inside a Lithium Battery at Sub‑Zero Temperatures? To understand why transmit power suffers,...

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