Top 20 Dewalt 7.2-18.0 Volt One Hour Charger Questions & Answers

this is the only one I have found.

D23 is a transient voltage suppressor. Code: 1.5KE51A

I had to replace that on one of mine. It is not a regular diode. P6KE51A Transient Voltage Suppression (TVS) Diode. That is the part # on the USA model. A European model may use different #.

Can you (carefully!) measure the volts across them with a load (battery) and then the current through them by disconnecting one end, and if the charger is still working OK then they are V/I ohms, choose nearest value. 10k sounds very high, are you sure they aren't 1 ohm or less?

Bad Battery

Fisrt, please check your charger is ok or not. Second, please check how many your battery has been used, if it has bee a long time, I suggest you to replace it to a new one. If you do not know how to find the right battery or charger for it, please go to cordless tools battery shop to have a look or ask them to check it for you. UK Handheld Vacuum Cleaner battery Cordless Power Tools Battery Laptop...

10k and 11k

From the manual.

Some chargers have a Problem Power Line indicator. When the charger is used with some

portable power sources such as generators or sources that convert DC to AC, the charger may

temporarily suspend operation, flashing the red light with two fast blinks followed by a pause. This indicates the power source is out of limits.

It is not feasible to convert it internally.

It is likely the fault is the battery and not the charger. To confirm this take the charger to any Radio Shack and ask them to test the charger or if you have a small meter do it yourself, the charging voltage will be up to 5 volts more than the rated battery voltage of the drill, so if you get a high reading don't worry about it. Fast charger will be way over the battery rating, also fast chargers have a cost, they shorten battery life due to heat. I have had many battery powered tools, I have found that the batteries last about 2 years on average. I have this same Dewalt drill driver.

IF is doing that without battery on it maybe charger is bad but if flashing that way when you put the battery could be the battery hope this helps!

I would it could be something as simple as an open fuse. Generally they cost around 75.00 depending on the charger.

Yes,it can be repaired try to go to the nearest service center in your place.Then try to check your charger.

the light will change to a constant green when fully charged. Anything other than that and you might have another problem. It usually takes about 1 hour

HI there,
Yes! I really think you're right there is a fuse, you need to open charger and you will see the fuse just by the power cord, check it out for the very slim wire is broken, burned or either way you should try replacing it, that sould not be expensive! good luck!

Hi,
I assume that you have tried it with another battery...if not try a different battery...the battery you tried maybe bad... this often happens...
If more then one battery does not work, then check the contacts inside where the battery goes to make sure there is no dirt on them or that they have not become bent...

If all that checks out then the charger went bad...

heatman101

You will need to replace the battery it is defective.

Can't be done.
Even if there was a safe way to put power to the neutral wire, the fact is you would still be running more than twice the power through it, and it would blow up. It would get much hotter.
Nor would the charger put out 7.2 to 18 volts any more.
It would put out over twice that.
The only way it could be done is if the unit was intended to also be run on 240 volts, and had a European selection setting switch.

This happens to me all the time. Check inside the charger and battery conection for debris. The battery you have may be bad or the charger may not be working properly. Most the time its the battery, either its too hot or too cold when you go to charge.