DeWalt 20V charger will last you a decent time, but not without certain problems along the way.
These charger problems are usually easy to handle if you know how to deal with them though.
So, let me help you with that by covering some of the most common ones.
Before that, I recorded a video to fix general DeWALT battery not charging issue, this video might help you out!
Read:
DeWalt 20V Charger Problems
- Power Issue and Damaged Power Cord
A bad power cord will lead to an unstable supply of power going into the charger.
This is dangerous for the battery and the charger itself.
I recommend checking out the power cord to see if its damaged or anything.
Take the cover off to see the points where the power cable connects to the charger.
Confirm that these look like the way mine do, and that there isn’t any damage on them or around them.
As you can see from the image below, there are two cable with Brown and Blue color respectively.
Please be aware that turn off the power supply before performing this step or you might risk electrical shock!
- Faulty Charger LED Indicator
A pretty common problem is the LED indicator on the charger going bad.
This might has happened even to you, and it can be pretty annoying just like the LED problem on the impact wrench itself.
The indicator lets you know when the DeWALT charger is doing its job, and what the health of the battery is.
- If the light is flashing, the your battery is charging but it still need time to complete.
- If it’s a solid color, the battery is now fully charged.
- If the charger whole light is on, and part of it is flashing, that means that there’s a temperature issue.
But, if the charging LEDs stop working, you won’t be able to know what’s going on even if the charger is still working.
Here’s what the LEDs should look like when functional and in use.
But, if your DeWALT battery won’t charger and no light, you need to take the cover off and inspect them.
The reason why this problem is common is because it’s easy for the LEDs to burn out or the board around them to fuse.
When this happens, they need to be replaced before they start working again.
As you can see from the image below, there are two LEDs, namely LED1 and LED3.
Tips: You may check whether these LEDs are still in good condition by using a multimeter to check.
Put it on a flat surface and touch the multimeter with the Pins of the LED as shown in the image below.
- Charger Internal Components Faulty
A charger is a complicated machine that uses lots of components. You can see most of them in this photo.
Unfortunately, any of these components are prone to being faulty.
One example of this is the transformer.
Transformer is responsible to step down the voltage and output 18V DC to charge the battery.
But, if they’re faulty, transformers can send an unsuitable amount of voltage through, which can cause serious problems with the battery.
If the voltage supplied is too high, it might even cause the battery to explode.
The rectifier, which converts alternating currents (AC) to direct currents (DC), can also be faulty.
You would need DC to charge the battery, as AC won’t do the job.
Other than that, there are components like specific wires and capacitors that might experience damage.
- Charger Overheating Issue
The charger should always be kept in suitable conditions to avoid triggering Hot/Cold Delay.
Otherwise, it can overheat which leads to obvious issues like cannot fully charge the DeWalt battery.
Don’t always keep it connected to a power source, as the constant flow of current can overheat it.
Just remember to make sure its temperature stays between 4°C to 40°C, because that’s the ideal temperature as you can see on my DeWalt 20V battery charger sticker here.
- Not Charging Suitable Battery
The DeWalt 20V charger can’t charge different brand batteries.
It always has to be a suitable DeWalt battery, as others simply don’t fit.
Yes, I mean suitable DeWalt battery, the 12V DeWalt battery might not compatible to this 20V charger.
Get yourself a compatible charger for your DeWalt Battery.
I tried to make a Black & Decker battery charge on my 20V DeWalt charger, as you can see here.
But, unfortunately, the results weren’t fruitful and they are just not compatible with each other.
- Loose Charging Pin
The charging pins you see below here are where you slide the battery in for charging.
These allow for the transfer of power from the charger to the battery.
If these pins get loose or damaged, they won’t be able to transfer charge properly.
That leads to intermittent charging issue and incomplete charging cycle.
I advise that you should check up on them regularly and not be too forceful with them.
Keep them in good condition as getting them fixed is difficult.
