DeWalt Battery Common ChecksUpdated 5 hours ago

Common check points when a battery does not appear to be working

Batteries can have some common characteristics during use. Before assuming the battery has failed, it's worth checking for a few common issues that can often be resolved.

Battery Won't Charge

Possible causes:

• Dirty battery terminals
• Faulty charger
• Battery temperature outside the charging range
• Damaged battery cells

Resolution:

• Clean the battery contacts with a dry cloth.
• Test the charger with another battery if available.
• Allow the battery to return to room temperature before charging.
• If the issue persists, replacement may be required.

Battery Loses Charge Quickly

Possible causes:

• Natural battery ageing
• Frequent heavy-duty use
• Extended periods of storage
• Internal cell deterioration

Resolution:

• Fully charge and cycle the battery several times.
• Store batteries in a cool, dry environment.
• Replace batteries that continue to deliver significantly reduced runtime.

Battery Gets Excessively Hot

Possible causes:

• Overloading the tool
• Faulty charger
• High ambient temperatures
• Internal battery damage

Resolution:

• Allow the battery to cool before charging or reuse.
• Ensure ventilation slots remain clear.
• Test with an alternative charger where possible.
• Replace the battery if overheating continues.

Tool Cuts Out During Use

Possible causes:

• Poor contact between battery and tool
• Battery protection system activating
• Low battery capacity
• Internal battery fault

Resolution:

• Remove and reinstall the battery securely.
• Clean the battery and tool contacts.
• Test with a known working battery.
• Replace the battery if performance remains inconsistent.