Lithium Battery Charging Protection Module MH-CD42 2.1A 5V

30.00 EGP35.00 EGP (-14%)

In stock

MH-CD42 DC 5V 2.1A Mobile Power Diy Board 4.2V Charge/Discharge(boost)/battery protection/indicator module 3.7V lithium 18650

wws Maya / Pre-sale Questions Need Help? Contact Us via WhatsApp
Purchase this product now and earn 30 Points!
SKU: MD-31091 Category: Tags: , , , , , ,

Lithium Battery Charging Protection Module

  • Providing mobile power for your DIY projects has never been easier with the MH-CD42 Power DIY board!
  • This tiny board offers simultaneous charge and discharge, lithium battery protection, and a 4 level LED
  • Connect any kind of 3.7V Lithium battery to have a 5V output with current up to 2.1A.
  • When charging, the four-level battery indicator starts with one flashing LED, meaning the battery is less
    than 25% full.
  • After some time, 2 LED will lit up and the first one would stop flashing.
  • That means your battery is 25% to 49% full.
  • Your battery is fully charged when all 4 LEDs are lit and not flashing.
  • In discharge mode, the same definition applies but in reverse.
Product Parameters
  • Charging voltage: DC4.5V-5.5V (recommended DC5V)
  • Charging current: 0-2.1A
  • Charging quiescent current: 100uA
  • Full voltage: 4.2V ± 1%
  • Discharge current: 0-3.5A
  • Discharge quiescent current: 50uA
  • Discharge efficiency: up to 96%
  • Output voltage: 5V
  • Output current: 0-2.1A
  • Ambient temperature: -20~ 85°C
  • The module comes with a lithium battery protection function (for lithium batteries without protection, with protection board)
  • Overcurrent protection (OCP)
  • Overvoltage protection (OVP)
  • Short circuit protection (SCP)
  • Over temperature protection (OTP)
  • Charge and discharge power level 4 interval indication
Pin Description
MH-CD42 2.1A 5V Lithium Battery Charging Protection Module
  • VIN: The correct input of the charging port (DC4.5V-5.5V (recommended DC 5V)
  • GND: negative input of the charging port –
  • GND: Lithium battery –
  • BAT: Lithium battery
  • GND: Output negative output –
  • VOUT: Output positive output
  • KEY: Output enable trigger port (low pulse trigger)
  • In the discharge mode (the charging mode KEY function is invalid), the KEY port is triggered once, and the output is turned on; the KEY port is continuously triggered twice, and the output is turned off.
  • When the load is first connected, the output will be automatically turned on. If the small fish 50MA is loaded, the output will be turned off after 30 seconds; if the load is greater than 50MA, the output will be continuously turned on.
  • Allow one side to discharge while charging (Note: this is the output voltage >4.7/<5V)
Wiring Instructions:
  • When the module is plugged in, the output will switch to external power supply (it will be powered off for 0.3s). When charging, the output voltage will be less than >4.7/<5V, depending on the charger load capacity!
  • Trigger mode: low level trigger (ground)
  • Connect to the single-chip microcomputer, if the connection is less than the load KEY, you can connect the single-chip microcomputer for about 20s to give a low level to keep the module working continuously.
Indicator Light
  • Car charging retrofit
  • Driving recorder power supply
  • Mobile power / charging treasure
  • Portable devices such as mobile phones and tablets
​Package Included:
  • 1 X 2A 5V Lithium battery charging protection module

Lithium Battery Charging Protection Module

Additional information

Dimensions 2.5 × 1.6 × 0.4 cm
Be the first to review “Lithium Battery Charging Protection Module MH-CD42 2.1A 5V”


There are no reviews yet.

WeCreativez WhatsApp Support
Our customer support team is here to answer your questions. Ask us anything!
👋 Hi, how can I help?

Main Menu