Review on KNACRO Protection Over Discharge Overcurrent Short Circuit Tools & Equipment by Carl Higdem

I built a Bluetooth portable stereo system using two 3" Dayton Audio speakers and a 50W Bluetooth board. Before purchasing this charging board I bought several others from China, ebay and Revain and none of them worked properly, if at all. This board worked the first time I plugged it in and has been for 10 months. I didn't check the voltage readings as I didn't have to. I used the same 18650 batteries in a 3S configuration and the system works just as well as the first day I plugged everything in. I use my Bluetooth stereo at least 3-4 days a week at work, so I'm constantly charging and discharging my batteries and haven't had any issues.