Schumacher Battery Charger Won’t Charge: Troubleshooting Guide

Schumacher Handheld Battery Charger with Engine Start — 6/12 Volt, 2/15
Schumacher Handheld Battery Charger with Engine Start — 6/12 Volt, 2/15 from


Having a reliable battery charger is crucial, especially when you rely on it to keep your vehicles or equipment running smoothly. However, it can be frustrating when your Schumacher battery charger fails to charge your battery. In this article, we will explore some common reasons why your Schumacher battery charger won’t charge and provide troubleshooting tips to help you resolve the issue.

1. Check the Power Source

The first step in troubleshooting your Schumacher battery charger is to ensure it is properly connected to a power source. Check if the charger is plugged into a functioning electrical outlet and if the outlet has power. Additionally, inspect the power cord for any damage or loose connections that may affect its ability to deliver power to the charger.

2. Examine the Battery

Next, inspect the battery you are trying to charge. Ensure that the battery terminals are clean and free from corrosion, as this can hinder the charging process. If you notice any corrosion, clean the terminals using a mixture of baking soda and water. Additionally, check the battery voltage using a multimeter to ensure it has enough charge to be charged.

3. Verify Charger Settings

Double-check the charger settings to ensure they are properly configured for the type of battery you are charging. Schumacher battery chargers often have different settings for different battery types, such as AGM, gel cell, or standard lead-acid batteries. Make sure the charger is set to the correct mode for your battery.

4. Inspect the Charging Clamps and Cables

Inspect the charging clamps and cables for any signs of damage or loose connections. Ensure that the clamps are securely attached to the battery terminals and that the cables are not frayed or worn. Damaged clamps or cables can prevent the charger from establishing a proper connection with the battery.

5. Test the Charger’s Output

If you have access to a multimeter, you can test the charger’s output voltage to ensure it is functioning correctly. Connect the multimeter’s positive lead to the charger’s positive output terminal and the negative lead to the negative terminal. The voltage reading should match the charger’s specified output voltage. If the reading is significantly lower or higher, the charger may be faulty.

6. Reset the Charger

If none of the above steps have resolved the issue, try resetting the charger. Unplug it from the power source and disconnect it from the battery. Wait for a few minutes, then reconnect the charger to the power source and the battery. Sometimes, a simple reset can resolve charging problems.

7. Contact Schumacher Customer Support

If you have followed all the troubleshooting steps and your Schumacher battery charger still won’t charge, it may be time to contact Schumacher’s customer support. They have a team of knowledgeable professionals who can provide further assistance and guide you through the process of getting your charger repaired or replaced if necessary.


A Schumacher battery charger that won’t charge can be frustrating, but by following these troubleshooting tips, you can often identify and resolve the issue. Remember to check the power source, inspect the battery, verify charger settings, examine the charging clamps and cables, test the charger’s output, and try resetting the charger. If all else fails, don’t hesitate to reach out to Schumacher’s customer support for further assistance. Keep your batteries charged and your equipment running smoothly!