2 November 2021
Coin-type batteries have a structure in which the distance between the positive and negative poles of the battery seal is very narrow. Therefore, when the battery is loaded in the device, the metal parts such as the terminals of the device may come into contact with the positive and negative poles of the battery, resulting in a short circuit. If the battery is short-circuited, the voltage will drop temporarily. If the short-circuit time is short, remove the battery and leave it for about 3 hours to recover the voltage, so you can use it by re-loading the battery so as not to short-circuit it. If you still cannot use it, please contact our customer service center.