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PostPosted: Wed Nov 23, 2016 2:14 pm 
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Anyone knows of any mains 18v adapter that can run all battery operated cordless power tools? So the idea is to buy cordless tools body only and buy a 18v mains adapter that will slot in to the battery slot? Any idea?


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PostPosted: Wed Nov 23, 2016 2:19 pm 
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I have looked into this, it's very hard to find a power supply that will provide enough amps to run the tool, those that do are large and expensive.


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PostPosted: Wed Nov 23, 2016 2:28 pm 
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Maybe laptop adapter?? Do you know much much amp a typical power tool needs, for example Makita impact driver?


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PostPosted: Wed Nov 23, 2016 2:38 pm 
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18v say 380w perhaps 21 amps :dunno:

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PostPosted: Wed Nov 23, 2016 2:39 pm 
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How about this 10A 18V power supply from #Ali. ..express? Sorry can't paste the link here... $21 is the price


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PostPosted: Wed Nov 23, 2016 2:51 pm 
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no you will need in excess off 25ah continuous as many new tools are 500+w or over 28ah

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PostPosted: Wed Nov 23, 2016 2:57 pm 
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this drill as a random selection is 650w/36a
http://products.dewalt.co.uk/powertools ... /DCD995P2/

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PostPosted: Wed Nov 23, 2016 3:27 pm 
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What you need is a battery charger and battery. The battery provides the necessary 'oomph' to keep the drill/tool going and the charger constantly replenishes it between use. You can connect the tool via a cable from the battery/charger arrangement.

The charger need only deliver a lower current than the tool requires - said current depending on the on/off ratio of the tool in use.

Easier (by far) to have one, or two batteries permanently on charge and swap out on a continual basis.

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PostPosted: Wed Nov 23, 2016 3:48 pm 
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You could go 12v and run a lead from your car battery.Crocidile clips and thick ish cable.you could also just use a car battery with battery charger on.


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PostPosted: Wed Nov 23, 2016 3:58 pm 
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I kind of favour the 12v idea as I always have a spare car battery, say 40ah one can deliver 250amp short time and 25 amp over an hour at nominal 12v whereas a good tool li-lon battery rated 3ah would maybe give 20amp short burst and 2amp over longer working time; main reason for going ni-cad li-lon was size and quicker recharge; would likely stick a 20 amp fuse in the jump leads but don't think battery chargers are good for hi current short time, as they mostly only provide up to 4amp; I use my battery charger for the 12v tire inflator and it does that okay.


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PostPosted: Wed Nov 23, 2016 4:20 pm 
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Don't forget that portable tools are not meant to run 'continuously' - which a large battery could achieve - so there IS a limit to what you want to do.

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PostPosted: Thu Nov 24, 2016 10:23 pm 
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Am I missing something here? If you're going to plug a cordless tool into an adapter straight into the mains would in not be much simpler to just use standard 240v tools?


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PostPosted: Thu Nov 24, 2016 10:28 pm 
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Grendel wrote:
Am I missing something here? If you're going to plug a cordless tool into an adapter straight into the mains would in not be much simpler to just use standard 240v tools?


my thoughts are there is far more to the question than we know :lol:
as an aside dewalt 18/54v stuff also has a 110 mains plug option [as a 55+55v option]

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PostPosted: Fri Nov 25, 2016 6:15 am 
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My mains drills are not designed for screwing and my Riobi cordless, one battery is dud and the other needs frequent charging, its too old to spend, even if avail, for a new battery, but too good to junk, my Draper has just gone that way and it was 24v as I don't have a 24v tractor battery in the shed, also they are too heavy to lump around the place, hence my interest in the subject. I have had to do some work far from the mains, but my car with its 12v battery would have been parked nearby, in those days I had a portable generator to lump around but no longer, even so it struggled with a standard DIY 300watt drill.


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PostPosted: Fri Nov 25, 2016 8:14 am 
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big-all wrote:
Grendel wrote:
Am I missing something here? If you're going to plug a cordless tool into an adapter straight into the mains would in not be much simpler to just use standard 240v tools?


my thoughts are there is far more to the question than we know :lol: ]


Yes , as it says in the original post the intention is to buy 18v tools to use which implies to me that the OP doesn't have any tools in the first place but does have access to the mains. If the cordless tools are then connected to the mains it removes the portability of those tools so in my eyes it just seems far more simpler , cheaper and efficient to just purchase corded tools in the first place with maybe one cordless drill/driver for screw driving.
As an aside a friend of mine keeps a 12v cordless in his van that he runs of a car battery. He's a farrier and drilling holes isn't a big part of his job so a regular cordless set up would more than likely not get used very often and be flat when he does need it so using the car battery is a good compromise.


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