How to judge how much power is left in the battery of the wireless microphone
To judge whether the battery can still be used, it is actually very simple, measure the short-circuit current of the battery: generally the new Duracell’s The short-circuit current is 9.5A, and the Shuanglu is 1.7A. You can use the 10A range of the multimeter. You can leave it at a touch. Pay attention to the reading on the meter. If your microphone is 60MA, then I advise you not to use Shuanglu. It can’t resist for half an hour. When the current of the general microphone is less than 0.6A, it will not work normally, and even stop transmitting. When the general battery current is below 2.5A, you have to pay attention to it. You have to know what the transmit power of this microphone is, and how long it will last. When a performance is about to start, take a watch and measure it one by one. .
However, because the internal resistance of the battery itself is very small, the instantaneous short-circuit current will be very large, so try to avoid short-circuit between the two poles, otherwise it will affect the service life or even destroy the battery. Another method is to connect a 1-5W, 1-10 ohm resistor in series in the short-circuit loop, so that the short-circuit current will be smaller and the impact on the battery will be smaller.
