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DieHard 28.71225 - User Manual

DieHard 28.71225
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0099001213-00
Model/Modelo
28.71225
6V/12V Battery Charger
& Engine Starter
6V/12V Cargador de Batería
& Arranque de Máquina
OPERATOR’S MANUALMANUAL DEL USUARIO
Read and follow all safety rules and operating
instructions before every use of this product.
SAVE THESE INSTRUCTIONS.
Lea todas las instrucciones de operación y reglas de
seguridad, así mismo aplíquelas a cada uso del producto.
GUARDE ESTAS INSTRUCCIONES.
Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.

Questions and Answers

  • J
    Jason WilsonAug 14, 2025
    Why DieHard Automobile Battery Charger is on but not charging?
    • B
      bennettmarcusAug 14, 2025
      If your DieHard Automobile Battery Charger is connected to the battery and turned on but not charging, it might be in tester mode instead of charge mode. To resolve this, press the CHARGE RATE button to activate the charge mode and select your desired charge rate.
  • A
    Amy PageAug 18, 2025
    What to do if my DieHard 28.71225 Battery Charger shows F05?
    • S
      Stanley HinesAug 18, 2025
      If your DieHard Battery Charger displays error code F05, and the battery isn’t holding a charge, first ensure there are no loads on the battery. If any exist, remove them. If there are no loads present, the battery may be faulty and should be checked or replaced.
  • C
    Cynthia HansonAug 21, 2025
    Why does my DieHard Battery Charger show F03?
    • P
      Paul CarterAug 21, 2025
      Error code F03 on your DieHard Battery Charger may indicate a faulty battery. Alternatively, it could mean you're attempting to charge a large battery or a bank of batteries using a current setting that is too low.
  • R
    Richard BakerAug 25, 2025
    What does F01 mean on a DieHard 28.71225?
    • R
      rsantiagoAug 25, 2025
      A F01 error on your DieHard Battery Charger could mean one of two things: either the battery is bad, or you're trying to charge a 6V battery using the 12V setting.
  • D
    Derek ThompsonAug 28, 2025
    Why DieHard Automobile Battery Charger will not turn on when properly connected?
    • B
      becky19Aug 28, 2025
      If your DieHard Automobile Battery Charger isn't turning on despite being properly connected, the issue might stem from a dead AC outlet or a poor electrical connection. Check the AC outlet for an open fuse or circuit breaker. Also, inspect the power cord and any extension cords for loose connections.
  • J
    Jasmine HernandezAug 31, 2025
    What to do if CHECK BATTERY (red) LED is on on DieHard Automobile Battery Charger?
    • E
      elizabeth57Aug 31, 2025
      If the red CHECK BATTERY LED is illuminated on your DieHard Automobile Battery Charger, it indicates a potential issue with the battery connection or the battery itself. Ensure the clips are making a solid connection to the battery and frame, and that the connection points are clean. Try rocking the clips back and forth to improve the connection. If the connections are good, unplug the charger and reverse the clips. If the issue persists, the battery may be defective and should be checked.
  • A
    amy89Sep 3, 2025
    Why is my DieHard Automobile Battery Charger making a clicking sound?
    • D
      David KennedySep 3, 2025
      If your DieHard Automobile Battery Charger is making a clicking sound, it could be due to several reasons: the circuit breaker cycling, a defective battery, or a severely discharged battery. First, verify that the charger settings are correct. If the settings are correct, have the battery checked. If the battery is severely discharged, allow charging to continue, giving the battery time to recover sufficiently to accept a charge. However, if the clicking continues for more than 20 minutes, stop charging and have the battery inspected.
  • G
    greenalanSep 10, 2025
    How to fix no reading on DieHard Automobile Battery Charger digital display?
    • S
      Shawna MartinSep 10, 2025
      If the digital display on your DieHard Automobile Battery Charger shows no reading, the charger may not be properly plugged in or there may be no power at the receptacle. Ensure the charger is plugged into a functioning AC outlet and check the fuse or circuit breaker supplying the outlet.

DieHard 28.71225 Specifications

General IconGeneral
BrandDieHard
Model28.71225
TypeBattery Charger
Input Voltage120V AC
Boost Amperage50A
Automatic OperationYes
Battery Type CompatibilityStandard, AGM, Gel
Charging ModesBoost
Safety FeaturesReverse Polarity Protection
Compatibility6V and 12V batteries

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