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Home / Car Auto / How to Guide / Charge a Car Battery

Charging a Car Battery

A charger and time are the two things you need to charge your car’s battery. More current can make your battery charge faster, but a too high rate can cause it to overheat and damage the battery. Charging your car’s battery is simple and easy. Follow our simple instructions below or watch our video tutorial below on how to properly charge a car battery.

Preparing to Charge

  • Make sure all the accessories in the vehicle are off
  • If removing the battery from the vehicle, remove the ground terminal first.
  • Put the battery in a well ventilated area
  • Clean battery terminals. Make sure not to get in your eyes, nose or mouth
  • Add distilled water to each battery cell to the specified level. DO NOT Overfill. Note: If it is sealed lead acid battery, follow manufacture’s charging instructions
  • Read charger, battery and vehicle instructions. Follow the batteries precautions while charger and recommended charging rates
  • Find the voltage of the battery and charge using the correct voltage. If the charger has an adjustable charge rate, charge the battery in the lowest setting
  • Make sure the charging clips are making connection.

Charger Locations

  • Place the charger as far away from the battery as you can.
  • While charging, never place the charger above the battery that is being charged
  • DO NOT set battery on Charger
  • Never drip battery acid onto the charger
  • DO NOT charge in a closed-in area

DC Connection Precautions

  • Only connect and disconnect DC output clips when the charger is in the “off” position and AC plug is removed from electrical outlet
  • Attach the clips to the battery and chassis, as indicated below

FOLLOW THESE STEPS WHEN BATTERY IS INSTALLED IN VEHICLE

A spark near the battery may cause a battery explosion. To reduce the risk of a spark near the battery:

  • To reduce risk of damage, place the cables in a safe place. Avoid the hood, door and moving or hot engine parts.
  • Stay clear of fan blades, pulleys, belts and other parts that can cause injury.
  • Check the polarity of the battery post. The POSITIVE (POS, P, +) battery post usually has a larger diameter than the NEGATIVE (NEG,N, -) post.
  • Find which post is grounded (connected) to the chassis. Typically, the negative post is grounded to the chassis, if so skip to the next step*. If the Positive post is grounded to the chassis, skip to the step after next**.
  • *Negative Grounded Vehicles: Connect the POSITIVE (RED) clip from the battery charger to the POSITIVE post of the battery. Connect the NEGATIVE clip to the vehicle chassis or engine block, away from the battery. Connect to a heavy gauge metal part of the frame or engine block. DO NOT connect the clip to the carburetor, fuel lines or sheet metal body parts.
  • **Positive Grounded Vehicles: Connect the NEGATIVE (BLACK) clip from the battery charger to the NEGATIVE ungrounded post of the battery. Connect the POSITIVE (RED) clip to the vehicle chassis or engine block, away from the battery. Connect to a heavy gauge metal part of the frame or engine block. DO NOT connect the clip to the carburetor, fuel lines or sheet metal body parts.
  • When disconnecting the charger, turn off all the switches, disconnect the AC cord, remove clips from vehicle chassis and remove clip from Battery terminal.

FOLLOW THE STEPS WHEN BATTERY IS OUTSIDE VEHICLE

A spark near the battery may cause battery explosion. To reduce the risk of a spark near the battery:

  • Check the Polarity of the battery post. POSITIVE (POS,P,+) and NEGATIVE (NEG, N, -)
  • Attach at least a 24-inch long 6-gauge (AWG) insulated battery cable to the NEGATIVE post.
  • Connect the POSITIVE charger clip to the POSITIVE post of the battery
  • Position yourself and the free end of the cable you previously attached to the NEGATIVE (NEG, N, -) battery post as far away from the battery as possible - then connect the NEGATIVE (BLACK) charge clip to the end of the cable.
  • Do not face the battery when making the final connection.
  • When disconnecting the charger, always do so in the reverse order of the connecting procedure and break the first connection while as far away from the battery as practical.
  • A marine (boat) battery must be removed and charged on shore. To charge it onboard requires equipment specifically designed for marine use.

DANGER - Never alter AC cord or plug provided. If it does not fit the outlet, have a proper outlet installed by a qualified electrician. Improper connection can result in a risk of an electric shock.

Video Transcript:
In this video we demonstrate how to charge a car battery with the Noco Genius G26000 wicked smart car battery Charger.
So what do we have here? Alright so this is a Noco Genius charger model G26000. We actually use these to charge car batteries. It actually charges at a 26A Amp. hour rate or at a 5A amp hour rate. We usually do a 5A Amp. hour rate. It actually recognizes what kind of battery it is. You can just cycle through and do a 5A Amp. hour charge.
If the battery is actually completely drained you do want to charge it at a 26A Amp. hour rate. It will actually charge a battery pretty quickly but if you're actually trying to equalize the whole the battery and trying to revive it, you can charge it at the 13.6V / 5A Amp. hour rate.
How long does it usually take when it's at a 5A Amp. hour rate? If it's at about 5A Amp. hour it usually takes about 6-10 hours.
And at 26A Amp. hour? About 2-3 hours.
This video was brought to you by atbatt.com

 

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