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How can I determine if the PSSLD battery has a blown fuse?

The PSSLD battery pack is equipped with two 12v 5ah batteries wired in series. A 15amp fuse connects these two batteries, safeguarding the rest of the system in case of a critical failure.

1. The initial step in diagnosing a bad battery fuse is testing the battery and charger combo. 

  • A well-known working charger and battery combination operates in the following manner:
    1. A PSSLD charger will display a green LED when it is connected to the wall and disconnected from the battery, indicating that it is ready to charge. 
    2. When the charger is connected to the battery, the LED will turn red while the battery charges. 
    3. The charger LED will go back to green when the battery is fully charged.

Q1: Is the charger LED green when connected to the wall and disconnected from the battery

Q2: Does the LED turn red while plugged in to charge the battery?

Q3: Does it go back to green when it is fully charged? 

      • If the charger LED does not switch from green to red when it is plugged in to charge the battery, the charger is most likely not recognizing the battery voltage - this can be an indication of a bad fuse. Proceed to step 2. 

2. Check the battery voltage.

If available, use a multimeter to test the battery voltage. This step is usually performed by a biomed or maintenance team.

      • If you are unable to test the battery voltage using a multimeter, or if there are no biomed or maintenance service available, you can proceed to step 3. 

  • Below is a chart that displays the battery voltage and its corresponding state of charge. 

    •  A healthy, fully charged battery will show +25v
    • A dead or depleted battery will show +21v
      • If the multimeter reads below 21v, the battery will need to be replaced.  
      • If the multimeter reads 0v, this can be an indication that the fuse is blown and the battery has an open circuit.  

3. Open the battery to check for a blown fuse. 

  • The battery pack housing is comprised of two parts that are held together with six hex screws. 
      • Opening a battery to check for a bad fuse should be a safe process, but please work with caution.  
    • Remove the six screws: 
    • Pull the two parts apart. Be careful not to pull the wires as they are attached to the batteries and the housing:
    • Check the blue fuse for damage: 
      A Good Fuse:

      A Bad Fuse: 

If you discover a faulty fuse in your battery, it could indicate an underlying problem in the power system that triggers a sudden surge in current, ultimately causing the fuse to blow. 

Please reach out to service@litegait.com and let us know the results of the troubleshooting steps.