When using the EF Johnson 5112, what should you avoid while the battery is charging?

When using the EF Johnson 5112, it is important to avoid transmitting signals while the battery is charging. This is because transmitting during charging can potentially interfere with the charging process and may cause overheating or damage to the radio. The device is designed to focus on properly charging the battery without the additional load or complications that come from transmitting.

In addition, other activities such as adjusting antenna settings, listening to other channels, or changing frequency modes are generally safe to do while the radio is charging. These actions do not place the same strain or risk on the charging system of the radio. Thus, prioritizing the battery's safety and longevity is crucial, which is why refraining from transmitting while charging is the recommended practice.