Model#: DEWNDCA1820

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Dewalt DCA1820 20V MAX Lithium-Ion Battery Adapter for 18V Cordless Tools (Bare Tool)

  • Dewalt DCA1820 20V MAX Lithium-Ion Battery Adapter for 18V Cordless Tools (Bare Tool)
  • Note: Battery & Charger sold separately
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You can now use Dewalt's 20V MAX line of batteries with your 18V power tool with the new DCA1820 Battery Adapter. Designed to work with an assortment of 18V tools, you can use the DCB201 and DCB203 20V MAX Lithium-Ion batteries without having to spend money on new tools.
  • Allows for use of 20V MAX batteries in most 18V tools
  • Requires use of 20V MAX charger
  • Adapter will not fit into DEWALT 18V Chargers
  • Use only with compact Dewalt batteries DCB201 and DCB203
  • Do not use with premium DEWALT batteries in DC970 or DC759 tools.
  • This Adapter will not work with 20V/60V FLEXVOLT Batteries.
  • 20V MAX Lithium-Ion Battery Adapter for 18V Cordless Tools - DCA1820
  • Bare Tool: Battery and Charger are Sold Separately
Compliance and Restrictions
warning: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to


Series: 20V MAX
Cordless: Yes
Battery Style: Slide
Battery Type: Li-Ion
Compatible Models: DCB201 / DCB203
Voltage: 20V



3.8 / 5.0
38 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (22)
No, I would not recommend this to a friend (1)
Easy To Use (8)
Value (5)
Lightweight (5)
Ergonomic Design (3)
Uncomfortable to Use (1)
Best Uses
Frequent Use (7)
Small Projects (7)
Home Repair (6)
Jobsite (6)
No, I would not recommend this to a friend
Discharges batteries
If you leave the battery on the tool with this adapter it will discharge the battery. I have two of these and both will kill the battery if left on the tool overnight. Bad design by Dewalt.
March 13, 2019
Describe Yourself:
Will discharge your battery if left connected
Well, it works other than it discharging your battery completely if left in the adapter. I don’t think that should happen since you can leave your battery in your 20vlt tool with no problem. A real let down. 3 tools, 3 batteries. Makes sense yeah? Now I have to have little parts loose in the bag so the batteries will stay full.
February 16, 2019
Originally posted at
DIscharges battery. Which tools,batteries work?
I have always loved Dewalt tools however, this is the biggest junk Dewalt has ever sold. There should be a buyback on these. The info that Dewalt provides is erroneous as to which tools and batteries work with the unit. Dewalt also doesn't explain that without removal of the battery from the adapter the adapter discharges the battery. Now I have new 6 amp batteries and new fast charger for an adapter that does not work in any of my 18 volt tools.
January 6, 2019
Originally posted at
Works great
Adapter is perfect and allows me to use all my 18 volt tools without buying more 18 volt batteries, that last only 6 months. It is hard to remove from the tools at first but gets easier once it's used. Good invention Dewalt.
December 29, 2018
Originally posted at
good tools, no straight answers
I have a large variety of 18v tools, batteries, and charger. Nowhere can I find if a new 20v tool will use my 18v batteries. Looks like any new tools will be a different brand.
November 24, 2018
Originally posted at
Waste of money
I brought one of these some months ago from (USA and imported to UK , went to use it today for first time on my finishing nailer. put in a fully charged Li-ion battery pack, indicator lamp lit up went to fired first nail then nothing. Unplugged, fiddled around, placed battery pack back in, no response at all. Put battery into my Li-ion first fix nailer and it worked without issue. Have since read that these units are finicky at best. Big BLACK mark for Dewalt
November 20, 2018
Originally posted at
Poor battery packs
I do not use these every day. These are about a year old and only charge to about 75%. One battery was replaced already by the factory. Not sure if the charger or the packs are the problem. I have to leave one on the charger all the time just to have some juice when I start a job, then the charge last no time on the packs.
November 4, 2018
Originally posted at
Don't buy
I bought this with 2 batteries six months ago, and it never worked properly. 1 Can't power my dc628k, only get flashing lights. 2) They discharge quickly when plugged into adapter. 3) It takes minutes of effort to dislodge from tool. I should have brought back for return. Don't buy, get the 18v instead.
October 24, 2018
Originally posted at
Don't bother
I've had countless DeWalt tools over the years and wanted this to work so I could move to the 20v stuff without losing use of my 18v tools. It's hard to remove, doesn't work with the new Flexvolt stuff which wasn't even out when I bought this... Put your money into a new system instead of this bandaid.
October 18, 2018
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Ergonomic Design
Best Uses
Frequent Use
Heavy Duty Requirements
Large Projects
Small Projects
Home Repair
Fits snug , better alternative than spending money on new 20 volt tools.
It's a little tight going in , but once it's locked it won't fall out easy. I have a lot of 18 volt tools yet that has years of life left , can't justify spending the money, besides , time I wear out the 18 volt tools DeWalt will change it up again and have to have something newer.
May 24, 2018
1 year ago
Describe Yourself:

Questions & Answers

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Browse 11 questions Browse 11 questions and 16 answers
I have makita 18v power this converter will fit to makita battery?
Roberto on Nov 28, 2018
BEST ANSWER: Probably best if you ask Makita technical support.
The description and tech specs says it will work only with the 200 and 203 series batteries but I have the 204 series batteries, will this product work the newer series of batteries?
DIYer on Aug 4, 2016
BEST ANSWER: I use this for my 203 series battery and it works fine.
I would think if it were more versatile they would certainly take advantage of the wider customer baseby including the 204 series in their description.
Sorry you wait ship to NZ
Dave on Jun 21, 2016
BEST ANSWER: CPO does not ship outside of the USA
How much does the adapter weigh?
dabbler on Apr 2, 2016
BEST ANSWER: approximately 0.5 lbs
Will the adapter kit work on a 12v battery tool?
A shopper on Dec 28, 2018
BEST ANSWER: The adapter only works on 18 Volt tools.
will this adapter work with higher volt lithium batteries ?
Bill C on Apr 6, 2017
BEST ANSWER: No. Your 18 volt tools won't operate on a voltage higher than 20 volt.
Is there an MSDS available for this?
A shopper on Oct 8, 2016
BEST ANSWER: Please contact the manufacturer direct at 1-800-433-9258 for assistance with MSDS requirements.
How much does it cost?
Steve on May 29, 2016
BEST ANSWER: This item is $49.99.
Will this adapter work with the Dcb 207 20volt battery on the DW 936 18 volt trim saw.
Captain63 on May 21, 2016
BEST ANSWER: This question would be best answered by Dewalt directly at 800-433-9258
Hi, you ship to the UK? also is this item in stock now?
many thanks
Alex on Mar 14, 2016
BEST ANSWER: CPO only ships within the United States at this time.


Dewalt Accessories Warranty

The warranty on new DEWALT accessories is as follows:

DEWALT offers a 30-day money back guarantee on all DEWALT accessories, except for pressure washer accessories. DEWALT accessories are fully guaranteed against defects in material and workmanship. The warranty does not cover misuse of product or normal wear and tear.