High performance: 10Watt (5W per speaker) portable audio amplifier that includes everything you need to implement a BMS (Battery Management Solution) for a portable audio amplifier (including a Charger: Fuel (Gas) Gauge and Protection for a 1S1P 18650 2400mAh Lithium battery) for a Class D Audio Amplifier. Get extended operating time by using efficient power regulators: Class D amplifier and proper battery management.