Want to make your own electric box? Then hurry up and collect! This article will teach you how to make a simple and easy to learn household appliances, and can also help you develop the ability to use household appliances. 1: How to install the electric box To install an electric box, you need to find a suitable outlet and plug the battery pack into it. Then connect the power switch. When you place the phone over the socket, you can see that electricity flows through the box and the charge starts to drain. This is ST-Microelectronics L9396.If you don't like the feeling, try switching to a simpler setting to use it. Most of the time, chargers are plugged into the wall, so if you want to have a switch for easy access, you can replace the plug with a wireless charging pad or convert it to a Bluetooth port. Anyone can make a very simple and practical electric box by themselves if they master the right method. 2: How to make a battery pack If you want to make a battery pack, the easiest way is to use batteries. First put them in a container, then add some liquid and electrolyte solution. The next step is to heat the water and pour it into it. Then adjust the device as needed to keep it at the right temperature. Finally, the rods are immersed in water for several hours to ensure good conductivity. When placed, it can be powered on. For different types of batteries, the current needs to be adjusted to meet the voltage requirements. Generally, if you choose 3 AA lithium batteries, you can add up to about 20A; Size 4-7 should be larger, but should not exceed 30A. Adjust the potentiometer to the appropriate position, you can start charging. Discharge time more than 8 hours is appropriate. Stored electricity in 5 times of charge and discharge, it will greatly consume electricity, so should be timely replacement of a new battery. 3: Introduction to the usage method Installing an electric box is simple. You only need to follow the following steps: 1. After turning on the power, hold down the switch for a few seconds until the contact is stable. 2. When you see the green charging indicator light on, it means that the battery is charging for electricity, then you can rest assured. 3. Input voltage to the battery socket. 4. Then press the switch to connect the phone/laptop to the car. 5. If you have more than one charging port, proceed step by step. 6. Finally we can use it for electric cars or other appliances.