Review on Beffkkip Discharge Integrated Charging Boosting by James Mayberry

This is a good device that takes on the task of charging a lithium battery when connected to a power source and provides the circuit with regulated voltage from the battery, when there is no power source. accessible. The behavior is similar to that of a laptop battery. Charges when connected to the network and powers the laptop when not connected to the network. In both cases, the laptop can continue to be used (with or without a power supply). This block works the same way. Your circuit will operate with or without a power supply when the battery is charged. The board is well designed and of good quality. The pins are positioned so that a smaller connector can be soldered on and the board can be used for testing on a breadboard. The device is clearly marked on the back, making it easy to connect cables. There are several ground pins to make connection easier. There are two pins for power, two pins for battery, and two pins for output or load. There is a key pin on the circuit board which is also connected to the button. It looks like this contact only works as a switch-off contact. LED indicators show battery level in 25% increments. They seem to be working fine. One of the LEDs will flash while charging to indicate the current charge level. The best feature of the board, in my opinion, is the boost voltage regulator, which takes 3.7V from the battery and outputs 5V. I noticed a slight fluctuation in the regulated output when switching between charging and discharging states. During discharging (without power supply) the output was 5V. During charging the voltage drops to 4.9V. Under load I saw the voltage drop to 4.8V when discharging. There is an issue with this device that can be problematic depending on how you use it. When the power supply is switched off, there is a slight delay in switching to the battery-regulated output and the voltage drops to 0 for a few milliseconds. I connected the Arduino Nano to the output and then toggled between charging and discharging and each time I did that the Nano restarted. I was able to compensate for this by adding a 1000uF electrolytic capacitor to the output. This was enough to prevent a momentary drop in voltage. However, I added an LED to the output as an additional load and the capacitor was no longer enough. As the load increases, a larger capacitor or more capacitors will be needed. I have attached two photos. The first shows the circuit during discharge. The output is 4.95V. The second photo shows an active power supply circuit. Output voltage 4.78 V. In general, good pay. When designing the circuit, be sure to consider the instantaneous voltage drop.