TDA7388 4*50W High Power Amplifier Automotive Audio 10W~100W HiFi Stereo Car 4 Channels Home Theater Digital DIY HiFi AMP

Type-C USB 2/3S BMS 15W 8.4V 12.6V 1.5A Lithium Battery Charging Boost Module with Balanced Support Fast Charge with Indicator(3S Balanced)

Mini Torch Brightness or Fan speed Li-ion Battery Charging Module Type-C

4S 14.8V 16.8V 100A w/balance Li-ion lithiu 18650 battery BMS protection