It is possible that a low battery could cause your phone signal to drop during a call. When your phone’s battery level gets low, it may reduce the power of the cellular radio to conserve energy, which can result in a weaker signal.
To prevent this from happening, try to keep your phone’s battery level above 20% or higher, especially if you are making an important call. You can also enable battery saver mode on your phone, which will automatically adjust your phone’s settings to conserve battery life. Additionally, try to minimize the use of battery-intensive apps or features, such as streaming video or using the camera, while on a call.
If you find that your phone’s battery is draining quickly, you may need to replace the battery or get a new phone if it’s old and no longer holding a charge well.