20 Most Recent Dewalt 7.2-18.0 Volt One Hour Charger - Page 6 Questions & Answers

Here is a link to a number of 220v chargers that will work for you. You can, of course, use the 110v charger with a down converter.


Dewalt 7.2-18.0... | Answered on Nov 29, 2009

usually it is a number 1 or 2 phillips or they used a #10 Torx drive bit for the screws. if it is star in shape it is the torx.

Dewalt 7.2-18.0... | Answered on Nov 19, 2009

it doesn't change to green, the solid red light means it is fully charged, there should be a legend on the front of the charger to help you with this. If it flashes real fast the battery is malfunctioning and slow flashing is charging and again solid is fully charger.

Dewalt 7.2-18.0... | Answered on Oct 03, 2009

that is normal it happens when u plugged and unpluged. after a second it should show no blinking. then when u insert the battery pack it would show the diagnostics. with the blinking pattern.

if you need the manual , you can get at www.dewalt.com or call us at 407 657 0474 and we can fax it to you.

Dewalt 7.2-18.0... | Answered on Sep 24, 2009


Dewalt 7.2-18.0... | Answered on Jan 12, 2009

all you needs is a step tranformer from 110v to 220v ac

Dewalt 7.2-18.0... | Answered on Dec 06, 2008

I'm disappointed that Dewalt does not have the full specs on their website so . . .
Check the specifications on the charger's label; they should read something like 120 VAC or Volts AC and 2.0 (or similar) amperes or just 'A' after a numerical value.
If the label does not give you an amperage value you can use the output value instead and substitute the output voltage at the high end if a range is listed.
To get the adaptor (step-down transformer) wattage, multiply the AC values such as:
120 X 2=240 watts input power.
If these AC values are not available;
Take the high end charge voltage if it is a multirange charger, and multiply those values;
One we own DW9108 (- yours is 7.2 - 18) is spec'd at 9.6 to 18 volts and 2.8 amperes:
2.8 X 18=50.4 watts.
You can see that the values do not correspond but it is a multirange device so the maximum current taken from the AC line can be ~ 2.0 amperes but this is charging a specific pack and the peak input current is only momentary so the maximum output current and voltage are the values one should use as a guide. In other words, the output wattage is closer to the value needed.
Since there are losses in any transformation (mostly heat), the required stepdown transformer must be capable of more than the indicated 50 watts.
A safe factor would be 1.5 X 50 (W) or ~ 75 watts minimum to ensure the charger receives the 120 volts it wants.      
Anything that will step down your (?) 220 volts and is rated at 75 watts or more will do the job even if the Dewalt draws a little more current at your line frequency of 50Hz which it may.

Dewalt 7.2-18.0... | Answered on Oct 09, 2008

for his charger the output volatge is 36v to 52 volts dc.

Dewalt 7.2-18.0... | Answered on Sep 19, 2008

It will be marked on the fuse, it varies with each charger.

Dewalt 7.2-18.0... | Answered on Sep 02, 2008

sorry unit are non repairable. not even a wiring diagram for it.

Dewalt 7.2-18.0... | Answered on Aug 21, 2008

sorry dewalt charger are non repairable. can't even get a wiring diagram for the unit.

Dewalt 7.2-18.0... | Answered on Aug 21, 2008

all i can say get a seperate step up transformer fron 110v to 220v.then just plug in charger to the step up transformer. make sure that u have 2 consider the frequency in ur country.

Dewalt 7.2-18.0... | Answered on Aug 21, 2008

when charger is plug in to ac it will blink once.normal voltage out for the unit in between 36v to 55 volt. the reading u have is normal.

Dewalt 7.2-18.0... | Answered on Aug 08, 2008

did you consider the freq. hertz in your country & US.
50 to 60hz

Dewalt 7.2-18.0... | Answered on Aug 04, 2008

Ok, for easy way, you can just put a 1~2A diode in series of the input 240v power wire, so the after voltage would be around 120v, but for precaution it is better that you put two diode in series, it will give you same result. In addition, I have already tested it on a similar charger, it works fine.
p.s: I do have a similar one that is also 110v, I compared it with other 240v one. They worked same.

Dewalt 7.2-18.0... | Answered on Jul 05, 2008

Inside my (older, non nano) dewalt charger there is indeed a fuse, which has never blown (yet).
I'd be suggesting that you contact dewalt before you void your warranty by opening it up though.

Dewalt 7.2-18.0... | Answered on May 28, 2008

The DW9116 is actually a 120 volt charger so it should cope with 130v AC supply, what is the supply from?

It is normal for a standard 110v supply to run at around 117V

See THIS INFO on power supplies

Dewalt 7.2-18.0... | Answered on Jan 30, 2008

I did a little hunting and it seems you really want to use your 110v charger on a 230v supply.....

So you could use a transformer (LINK)

or you could get a local power supply pack.

Read the label on back of power pack that attach's to wall socket and charger base, see what input it can handle, some gear can handle like 110v-230v, others cant ie will read 120v

Any adaptor that puts out the same output as the original would work ie 18v DC 2.5 amps is your specs i beleive so use a transformer or another suitable adaptor

Please check my quoted specs are the same as listed on power pack of your charge ie I am assuming you are using your 110v A.C. to 18v 2.5amp D.C power pack

Dewalt 7.2-18.0... | Answered on Jan 30, 2008

You can try warranty services. However, if they are having an event in your area you might just try going down there. I have taken bad batteries to them in the past and they just GAVE me a new one.

Dewalt Drills | Answered on Oct 31, 2019

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