About Payment 
 Shipping & Cost
 Battery SDS
 Battery Terminology
 Battery Knowledge
Privacy Policy
 Export restrictions


Shopper Award
Security Verified Seal

Fuel Gauge for PCB of 11.1v Li-Ion Battery Pack (#4478)

Your Price: $7.95
In Stock

Product ID # 4478
Part Number:

Quantity Discounts

5 to 20$7.71
21 to 50$7.55
51 to 100$7.39
101 or more$7.15

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 3 cells Li-ion / Polymer Li-ion 11.1V 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  < 9.0V  (must recharge battery)
    • 1 LED = pack voltage: 10.2 - 11.3V  (battery need recharging)
    • 2 LED = pack voltage: 11.2-11.9V
    • 3 LED = pack voltage: 11.6-12.3V
    • 4 LED = pack voltage: 12.1-12.5V
    • 5 LED = pack voltage: 12.2V or higher ( battery is fully charge)



  • Please check polarity before making connection to avoid damaging the module.
  • This fuel gauge is use for 11.1V pack only or it will damge the fuel guage. 
  • Please make sure your selection is correct before purchasing. 

 How to connect to PCB with fuel gauge connector

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

Related Products

Product Reviews

(1 Rating, 1 Review) Average Rating:
Good service, quick response and useful web page
miningo (Margate, FL ) 6/28/2012 3:16 PM
Good service, quick response and useful web page
What to consider when designing Lithium Batteries?
Bluetooth Technology for Lithium-ion/LiFePO4 Batteries
UN 38.3 Safety Test

We own a national standard UN38.3 testing lab. We can provide UN38.3 test service to our customer.

If you want to set up your own lab, we also provide UN38.3 & IEC62133 equipments and onsite training. Email us for the quote and lead time.
Lithium Battery Shipping Regulation
Recommendations on How to get ≤30% Rated Capacity for Shipping
Thermal Abuse Test for IEC62133
Mailing Lists