Changes

* V1.3 <span style="color:red;">removes </span> the ASD harware function and adds power surge protection function. , but we '''new add''' the software shutdown python script when battery is low voltage, please rerfer to [[X728-Software]]

Q:Why Raspberry Pi is randomly rebooting all the time? A:You can follow the steps to test if the X728 issue: a:Take the X728 off from the Raspberry Pi, remove all the batteries, power supply, and all jumper caps. Then connect the battery or power supply, press the blue power button on X728, the blue LED should be on, and then press and hold the power button for more than 8 seconds, the blue LED should be off.(These steps indicate that the X728 has no issue.) b:Please check and confirm if other device occupy the GPIO with X728. c:Still not find out the issue, please attach a video to contact us show more details.  Q: Why the X728 V1.3 remove the ASD function? A: Because the ASD jumper will generate some issues, so we remove the ASD jumper, but now you can achieve ASD function by software. Read the voltage through I2C, and then decide whether to shut down.  Q1: Why X728 V1.2 automatically shuts down?

1. X728 V1.2 will automatic safe shutdown when battery voltage is low than 3.0V, please charge in time;