... freely,Additonal cost is not included)1PC X USB Multifunction Mobile Phone Charge Connector for 10 ... Electricity.Product Advantages:1. Simple Operation. Just switch on the unit, it can be used. 2. ... , is thus in both cases close to zero. PWM also works well with digital controls, which, because ... durability.4. Adopt low MOS tandem control circuit on Charge circuit, reducing nearly half circuit voltage ...