101 Inc. Li-Po Warning Buzzer

This little helper is a very useful tool when it comes to checking your Li-Po batteries for harmful under voltage. For this, the Li-Po Warning Buzzer is plugged into the balancer port of the battery, whereupon a certain voltage is displayed in the Mini Display. Depending on the cell and state of charge, the buzzer then warns of an existing or imminent under voltage, which tells you it is necessary to charge the battery.
Useful (Of course?) You can also connect the Li-Po Warner to the battery during the Airsoft game to regularly check the battery performance. This can effectively protect against permanent damage to the battery cells and increase the longevity of the batteries enormously.