You can turn your project portable by adding a lithium battery like the popular 18650 or a li-po cell but you will need to somehow charge it. This single-cell Li-ion/ Li-po charger simply connects via a Micro B USB or powered directly with 5VDC to the solder pads either side of the USB connector. Connect the single cell battery to the B+ and B- and your load (your project) to Out- and Out+.

Available in USB Micro B or Type C


  • Single Cell Lithium-based battery charger based on the TP4056 charging IC
  • Input Voltage: 5VDC
  • Charging voltage limit: 4.2VDC
  • Minimum discharge voltage: 2.5VDC
  • Maximum discharge current: 3A

Using the module:

  • Connect Micro-USB cable for power, or 5V DC to pads marked IN+ and IN-
  • Connect cell to charge to B+/B- pads on right-hand side of module
  • A load (something for the battery to power) can be connected to the OUT+/OUT- pads on the right-hand side
  • The red LED indicates charging in progress, green LED indicates charging has finished.
  • Never charge your battery at a rate greater than 1C.


Barcode # PWR8021
Shipping Weight 0.0020kg
Shipping Width 0.030m
Shipping Height 0.003m
Shipping Length 0.015m
Shipping Cubic 0.000001000m3

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