• Problems and Solutions

    Problem: Acid flood from the lid
    Possible Cause: Battery is overfull
    Solution: Decrease the liquid level in the battery. Comply with the warning and instructions

    Problem: Acid level is deficient
    Possible Cause: There may be a leak from the covering box or gas outflow because of over charging.
    Solution: Check your charger or buy a new Mutlu battery

    Problem: Low acid density (<1.240 kg/dm3) and difficulty on starting
    Possible Cause: Inadequate charging, a hardware draining the electricity, short circuit
    Solution: Charge your battery again, get your cars charging system checked (regulator, alternator, electric system)

    Problem: High acid density (>1.240 kg/dm3)
    Possible Cause: Battery has been added acid instead of pure water
    Solution: Acid level should be decreased and replaced with pure water (shall be repeated if needed)

    Problem: Difficulty on march starting, low voltage
    Possible Cause: Battery is discharged, dead (loss on positive plates), problem in one of the cells or sulphation
    Solution: If it is discharged battery can be charged again otherwise a new Mutlu Battery shall be purchased.

    Problem: Excessive wear and tear on polar and connections
    Possible Cause: Faulty electric system or polar connection
    Solution: Tighten the connections or renew cleats if needed

    Problem: Boiling in one or more cell during march start
    Possible Cause: Failure in cells or loosened, gapped polar connection
    Solution: Tighten the connections or renew cleats if needed, purchase a Mutlu battery if the problem continues

    Problem: Easily and often discharged battery
    Possible Cause: Charge level of the battery may be low, there may be a short circuit or sulphation (plates in the battery goes stiffen and turn to white)
    Solution: Check the charging level of the battery or purchase a new Mutlu battery

    Problem: Short life time
    Possible Cause: Wrong battery selection, too much exposure to deep discharge or leaving the battery for too long in deep discharge mode.
    Solution: Replace the battery with a higher capacity one, if this is not possible check periodically and charge when needed.

    Problem: Battery getting hotter than normal during operation and excessive water loss
    Possible Cause: Your car might be charging on a high voltage
    Solution: Get your cars electric system, alternator checked

    Problem: Explosion of the battery
    Possible Cause: After charging gasses flared up because of static electric or short circuit causing explosion
    Solution: Purchase a new Mutlu Battery

    Problem: Battery not working
    Possible Cause: Failure in the internal system of the battery or deep discharge
    Solution: Purchase a new Mutlu Battery

  • Battery Selection and Installation

    montajYou can select the correct type of battery for your vehicle using our catalogue which comes with detailed specifications for each battery. The most important criteria in selecting a battery are dimensions, cold start current and capacity values. Dry batteries require water which must be added in accordance with instructions provided above and charged if needed.   
    Wet-charged batteries should be recharged in accordance with instructions provided when the average daily temperatures are below 4°C and the open circuit voltage is 12.5 Volts and below. 
    Follow the same procedure if the open circuit voltage is 12.5 Volts and below despite higher temperatures.  
    Before disconnecting the old battery, mark all of the battery cable lugs or terminals as +/- to avoid reversed connection when installing the new battery.
    To install your new battery, first measure the battery voltage and its direction and confirm that all the values are correct. Then carefully inspect the battery case and the connections, clean the case and battery cable lugs. Place the battery, reconnect the cables, and tighten bolts.
    Attach the positive (+) cable first and the negative ground (-) cable last. Tighten the bolts carefully; over tightening the terminal posts will severely damage the battery, especially in stud terminals. 


  • Charging

    In batteries with removable caps (non-sealed), the charge time –at temperatures 20°C to 35°C– depends upon reaching an electrolyte density of 1280 g/cm3 in all cells. Charging is complete once this value is established. After letting the battery sit for 30 minutes, adjust the electrolyte level to its maximum level, wipe the top, and then install the battery. Wet-charged batteries or customer's discharged batteries are charged according to the current levels and time periods given in the table below. Note that used batteries may not be able to reach the desired density level. In such cases, if the adjusted density remains unchanged in the last two hours, charging is considered satisfactory. Sealed batteries without removable caps (maintenance-free) are charged in accordance with voltage values.
    1. Make sure the charger is turned off.
    2. Measure state of charge of the battery.
    3. Hook up the charger to the battery. Connect positive charger clip to positive post of battery, and negative to negative. Make sure you always look at the battery and determine the positive by the plus sign and the negative by the negative sign.
    4. Select desired current and voltage in accordance with your chargers settings and instructions provided in manufacturer's manual. Start charging.
    5. Once the charging is over, turn off the charger before disconnecting the clips.
    6. To determine whether there is need for additional charging, measure open-circuit voltage and cell densities.
    You can parallel charge several batteries of same capacity, simultaneously.


  • Testing

    Prior to any testing, visually inspect the battery for:
    1. Loose or broken connections
    2. Cracked or broken case or cover
    3. Damaged or leaking terminals
    Proceed with the next step if there is no apparent damage on the battery.
    Testing the State of Charge:
    Take an open circuit voltage reading, using a reliable high quality voltmeter.
    Note:  Do not measure the charge level of a recently charged battery, in-vehicle or serviced elsewhere, since the high surface charge will be misleading. To dissipate surface charge, discharge the battery by 15x15 A. If the battery is already installed into vehicle, turn on the front headlights for 15 seconds.  
    The Charge Level:
    1. If the voltage is around 12.4 (state of charge is 75% or higher), proceed to a load test.
    2. If the voltage is below 12.4 (state of charge is below 75%), be sure to charge the battery before a load test in accordance with the charging instructions.
    Voltage and density may change by various battery designs.  
    Load Testing:
    The reading of a load test is largely dependent upon the equipment used for testing. The results should be interpreted in accordance with the instructions provided by the load tester manual. 
    Electrical System Check:
    Whether you are installing a new battery or working on a defective battery, check the electrical system of the vehicle that utilizes the battery. The most damaging mistake for your vehicle would be over charging or short charging of the battery. Measure alternator output voltage: the reading should be between 13.8-14.4 volts for hybrid batteries (at full throttle); 13.8-14.8 volts for Ca-Ca batteries (in a 12 V vehicle).
    Note: In vehicles featuring data storing computer systems, memory loss may occur with changing of the battery. To avoid cutting power to the system, install a second battery or special equipment before dismounting.

    1.280 Start-up Electrolyte Level and Charge Status at 27°C

    % Approximate Charge  Open Circuit Voltage Approximate Density
    100 12.6V 1.280
    75 12.4V 1.240
    50 12.2V 1.200
    25 12.0V 1.160




    Note: Disconnecting battery may cause memory loss in electronic systems; to prevent this, the lighter plug can be inserted as an alternative power supply.