A safeguard circuit for LiPo and LiIon packets that prevents over-discharge. The device it connected in a packet to a balancer port. The device signals to the user excessive discharge using sound (integrated buzzer). The implementation of ElectroRiver LiPo Alarm guarantees increased packet safety and significantly prolongs its lifetime. It is worth to remember that when finished using the battery, the entire alarm circuit should be disconnected in order to prevent discharging the packet.