DeWalt 18V to 20 Vmax adapter

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Forum topic by curliejones posted 06-02-2016 03:49 PM 277 views 0 times favorited 2 replies Add to Favorites Watch
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145 posts in 1689 days

06-02-2016 03:49 PM

Topic tags/keywords: dewalt 18v adapter

I have only two battery-operated tools (and a flashlight) from DeWalt and I’m a DIYer, so they see only occasional use. The two are 18V drill/driver and a 1/4” impact driver. These were a lot of help building my new shop, but I’ll be using my compact pair of Makita tools for shop work. I have a 5- year old 10.8V Makita set and the original Li-ion batteries are still working fine. Should they go out, I’ll definitely replace them and keep using the tools.

My question to the community: Since DeWalt sells an adapter and an adapter kit that allows use of 18V tools with the newer 20V max Li-ion batteries, I’d love some feedback from any and all who may have purchased the adapter and or kit. The kit is sold for $150 as DCA1820 adapter, a charger, and two 1.3 Ahr batts. whereas the adapter is sold separately for around $55. If my research is correct, the adapter allows for the use of compact batteries only with perhaps the largest being only 2 Ahr. To buy the 2.0Ahr batteries separate from the adapter. A new charger is required to charge the Li-ion batteries so buying separately costs closer to $180.

My orginal Ni-Cd batteries from DeWalt only lasted about 2.5 years whereas the replacements I currently use are still working fine after 2 years. They are large and heavy. BUT, 1.3 Ahr batteries are for short duration.
ANYONE OUT THERE who bought the adapter/kit and wants to share their experience? Happy? Regret? How much bulk is added by having the adapter between the drill and the battery?
Thank you all!

-- Like Guy Clark sez - "Sometimes I use my head, Sometimes I get a bigger hammer"

2 replies so far

View JayT's profile


4681 posts in 1634 days

#1 posted 06-02-2016 04:23 PM

You should be able to use any of the 20V Max batteries with the adapter on almost all tools. The only restriction I’m aware of is for a couple models of the promotional compact drills, where the motors and wiring are reduced to meet a price point and could be overloaded by the high capacity battery.

-- "Good judgement is the result of experience. A lot of experience is the result of poor judgement."

View shovel's profile


6 posts in 182 days

#2 posted 06-02-2016 06:11 PM

I bought the adapter and batteries a few months ago when they first came out. I belive it came with a charger… I bought a 20v drill and driver at the same time. These are big upgrades to the 18v that I’ve had for 15+ years. The adapter and 20v battery together are lighter than the 18v units, and add no more bulk. I haven’t done any long duration jobs where I have discharged a single battery yet, but so far so good. The adapter has worked well in the 18v reciprocating and circular saws and an impact drill. I am pleased so far.

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