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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →If your DEWALT cordless tool battery won’t charge, start by reseating it, checking the outlet, and allowing a hot or cold pack to reach a suitable temperature. Then read the indicator using the label or manual for your exact charger model. A light pattern by itself cannot reliably tell you whether the battery or charger has failed.
Why won’t my DEWALT battery charge?
Common causes include an incompletely seated pack, a switched-off or dead receptacle, battery temperature, or a problem with the pack or charger. DEWALT’s guidance for the DCB118 says the pack should be seated and clicked into place; its battery and charger manual also lists outlet and temperature checks. Start with these low-risk checks before treating a blinking light as a fault.
What to check first
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Reseat the battery and inspect for visible damage
Remove the pack, then reinstall it so it is fully seated and clicks into place. Look over the exterior of the battery and charger for obvious damage or debris. Do not insert conductive objects into charger cavities or probe the charging terminals: DEWALT warns that the terminals can present a shock hazard and says to keep conductive foreign material away from charger cavities. DEWALT support: DCB118 charging guidance
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Verify the outlet
Make sure the charger is plugged into a suitable receptacle. Test the receptacle with a lamp or another appliance, and check whether a wall switch controls it. These basic power checks are included in DEWALT’s Batteries and Chargers Instruction Manual.
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DeWALT DCB107 12V/20V MAX Lithium Ion Charger (Bulk Packed)- Charges all DEWALT 12V and 20V MAX Li-Ion batteries. Charges batteries in 1 hour or less, minimizing downtime.
- Diagnostics with LED indicator communicates battery charge status.
- Energy Star qualified for a better environment.
- This battery charger requires 120V 60hz input power and has the standard 2-prong North American plug.
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Let a hot or cold pack adjust naturally
A battery that has just been used hard may be too hot, while one left in the cold may be too cold to charge. In either case, the charger may enter Hot/Cold Pack Delay: it suspends charging and resumes automatically when the pack reaches a suitable temperature. Do not try to bypass the delay.
The cited DEWALT manual gives 65°F–75°F (18°C–24°C) as the preferred ambient charging range and says not to charge below 40°F (4.5°C) or above 104°F (40°C). Those figures come from that manual; follow the instructions for your own battery and charger.
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DCB112 20V MAX Battery Charger Replacement for Dewalt Battery Charger, Compatible with Dewalt 12V-20V Battery- Versatile Charging : The DCB112 charger efficiently charges batteries for Dewalt 12V-20V tools, providing a reliable power source for a wide range of Dewalt equipment. Equipped with advanced technology to recharge your batteries for DeWalt tools, reducing downtime and increasing productivity on the job
- Built-In Safety and Durable Construction: Equipped with advanced safety features including protection against overcharging, overheating, and short-circuiting, and made from high-quality materials to withstand daily use, ensuring safe, reliable, and long-lasting performance for DeWalt batteries every time
- Compact and Portable Design: Lightweight and easy to carry, making it ideal for both job sites and workshops, ensuring your tools for Dewalt are always ready to go.
- Smart Charging Status Indicator: LED indicator shows red blink during charging, solid red when fully charged, and green for faults (overheating, short circuit), ensuring safe and easy monitoring
- User Guide:When installing the battery, align it with the slot and apply moderate pressure until you hear a click, indicating it is securely in place. After installation, gently pull the battery to verify it is locked. Clean the contacts regularly and use compatible batteries to ensure proper operation.
What does the flashing light on my DEWALT charger mean?
It depends on the charger model. A blinking light can indicate normal charging on the DCB118, according to DEWALT’s DCB118 support guidance. Other chargers may use different patterns, so check the label beside the lights and the manual for the exact model. Older chargers may differ, and a pattern from one model should not be applied to another.
How to narrow down whether the pack or charger is the problem
If the seating, outlet, and temperature checks do not resolve the issue, try a second battery pack that you know is compatible with that charger, if one is available.
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- State of Charge Indicator: Two-stage LED state of charge indicator
- Compatability: DEWALT 12V MAX*, DEWALT 20V MAX*, and FLEXVOLT batteries
- Portability: DCB1104 4A charger is 15% smaller than DCB115 4A Charger.
- Mounting Capability: Two screw wall mount (screws sold separately)
- If the second pack charges, the original pack may be defective.
- If the second pack shows the same trouble indication, the charger may be at fault, but the test does not rule out a problem with either component.
This cross-check can help identify the likely source; it is not a conclusive diagnosis. If the problem persists, DEWALT’s manual recommends contacting a local service center for evaluation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When to stop troubleshooting and get service
Seek manufacturer or authorized service guidance if charging still fails, the pack is cracked or damaged, or the charger indicates a fault. Do not open a sealed battery pack or attempt an improvised repair. Use the manual for service and recycling instructions.
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- Dual Port Charging: Efficiently charges two batteries simultaneously for Dewalt 12V-20V tools, saving you time and ensuring your tools are always ready for use.
- Wide Compatibility: Designed to be compatible with a range of batteries for Dewalt tools, including 12V, 14.4V, 18V, and 20V MAX models, making it a versatile addition to your tool kit.
- Advanced Charging Technology: Equipped with intelligent charging capabilities, this technology is designed to reduce downtime and enhance productivity by providing efficient and reliable charging for DeWalt tool batteries.
- Safety Features: Built-in safety mechanisms protect against overcharging, overheating, and short-circuiting, ensuring safe and reliable operation for Dewalt batteries.
- Durable and Compact Design: Sturdy construction ensures long-lasting durability, while the compact design makes it easy to carry and store, perfect for both job sites and workshops using Dewalt tools.
If evaluation points to a failed charger, check for a compatible DEWALT replacement rather than assuming any charger will fit. For example, DEWALT lists the DCB118 as a 20V MAX*/60V MAX* FLEXVOLT 8 Amp Fast Charger. Verify compatibility with your specific pack and tool system before choosing a replacement.
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