why does my Honda CR-V's battery keep dying after a few days

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked in a safe area and is turned off.
• Disconnect the negative battery terminal to avoid electrical shock.

2. Battery Inspection and Replacement

• 2.1. Inspect the Battery
  • Check for physical damage or signs of swelling.
  • Clean any corrosion on battery terminals with a mixture of baking soda and water.
• 2.2. Replace the Battery (if necessary)
  • If the battery voltage is below 12.4 volts, replace it.
  • Remove the old battery by unscrewing the battery hold-down clamp and disconnecting the positive (+) terminal first, followed by the negative (-) terminal.
  • Install the new battery by connecting the positive terminal first, followed by the negative terminal, and secure it with the hold-down clamp.

3. Alternator Testing

• 3.1. Test Alternator Output
  • Reconnect the negative battery terminal.
  • Start the engine and measure the voltage across the battery terminals; it should read between 13.7 to 14.7 volts.
• 3.2. Replace Alternator (if defective)
  • Disconnect the battery.
  • Remove the serpentine belt using a wrench to release tension.
  • Unplug the alternator's electrical connector and remove the mounting bolts.
  • Install the new alternator by reversing the removal steps and reconnecting the battery.

4. Addressing Parasitic Draw

• 4.1. Identify the Source of Draw
  • With the vehicle off, use a multimeter set to measure current and connect it in series with the negative battery cable. A draw above 50mA indicates an issue.
• 4.2. Locate and Repair the Source
  • Pull fuses one at a time to identify which circuit is causing the draw. Repair or replace any faulty components.