Fork me on GitHub

Project Notes

#544 ShengYang 18650 Battery Shield

Checking out the ShengYang 18650 Battery Shield V3 - single cell with USB charge controller and three regulated outputs - 3V, 5V and switchable USB Type A.



I purchased my unit from a seller on aliexpress.


  • charging:
    • micro USB input
    • 0.5A current charging
    • 5-8V Input Voltage
    • LED indicators:
      • Green: full (L1)
      • Red: charging (L2)
  • battery protection:
    • Over charge
    • Over discharge)
  • output:
    • Type-A USB Output (with switch)
    • 3V 1A (3 sets of connection pads)
    • 5V 2A(3 sets of connection pads)
  • board Size: 9.8x2.9cm/3.86x1.14inch


Core components:

  • TP4056 constant-current/constant-voltage charge controller
  • FP6298 Low-Noise 4.5A Step-Up Current Mode PWM Converter



Charging is vie the micro USB marked “Input” (5V).


LED Meaning
L1 (green) Charged
L2 (red ) Charging





Measuring 3.2V and 5V output:


Credits and References

Project Source on GitHub Project Gallery Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is just my personal collection of projects. Two main themes have emerged in recent years, sometimes combined:

  • electronics - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting
  • scale modelling - I caught the bug after deciding to build a Harrier during covid to demonstrate an electronic jet engine simulation. Let the fun begin..
To be honest, I haven't quite figured out if these two interests belong in the same GitHub repo or not. But for now - they are all here!

Projects are often inspired by things found wild on the net, or ideas from the many great electronics and scale modelling podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know (or send a PR!). See the individual projects for credits where due.