101 INC - Li-Po warning buzzer

This small helper is a very useful tool when it comes to checking your Li-Po batteries for harmful undervoltage. To do this, the Li-Po Warning Buzzer is plugged into the balancer connector of the battery, whereupon a specific voltage is shown on the mini display. Depending on the cell and charge level, the buzzer then warns of an existing or impending undervoltage, which makes charging the battery necessary.
Usefully (naturally?) you can also clip the Li-Po alarm onto the battery during Airsoft games in order to regularly check the battery performance. This can effectively prevent permanent damage to the battery cells and greatly increase the service life of your batteries.