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Fuel Gauge for PCB of 3.7v Li-Ion Battery Pack (#3204)

Your Price: $6.95
In Stock

Product ID # 3204
Part Number:

Quantity Discounts

5 to 20$6.74
21 to 50$6.60
51 to 100$6.46
101 or more$6.25

Note: This fuel gauge is not intend to be use as a very accurate reading of the battery pack's capacity. The battery level indication can vary by 5% depending on the capacity of the pack!


  • Apply to PCB/PCM of 1 cell Li-ion / Polymer Li-ion 3.7V battery pack.
  • No external power is need
  • Can connect directly to pcb/pcm via special connector on board or connect directly to output of battery pack
  • 5 LEDs display battery pack's voltage. The voltage listed below is base on battery during discharge. (The actual voltage might vary for LED 2-4 during charging.) 
    • 1 LED Flashing = pack voltage  < 2.8V  (must recharge battery)
    • 1 LED = pack voltage: 2.7-3.6V  (battery need recharging)
    • 2 LED = pack voltage: 3.3-3.9V
    • 3 LED = pack voltage: 3.6-3.9V
    • 4 LED = pack voltage: 3.8-4.2V
    • 5 LED = pack voltage: 4.2V or higher ( battery is fully charge)



  • Please check polarity before making connection to avoid damaging the module.
  • This fuel gauge is use for 3.7V pack only or it will damge the fuel guage. 
  • Please make sure your selection is correct before purchasing. 

 How to connect to the excluded PCB

 The LED fuel gauge locate on the pack's surface by double side tape

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