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20 volt dewalt batteries 12 volt appliances
Posted:
Thu Dec 31, 2020 4:06 pm
by yycwrangler
does anyone know if I can use my 20 volt DeWalt batteries to power 12 volt appliances in my trailer. Mostly looking at led lights and low voltage things. I see an adapter than can be purchased but all it is, is a unit that you connect your 20 volt batteries to and have 2 wires running out of it. (see below). What about using an invertor
https://www.etsy.com/ca/listing/7525603 ... MgQAvD_BwEcheers
Al
Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Thu Dec 31, 2020 5:35 pm
by flboy
20V will most likely cause damage to most 12V devices. If not outright damaging the device, it may significantly reduce the lifespan..
I would not advise it.
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Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Thu Dec 31, 2020 5:52 pm
by NevadaBlue
Many “12 volt” things will run on up to 15 volts because they ‘plug in’ to a vehicle and the alternator can sometimes produce more than 13 or 14 volts. The battery is there to provide a cushion in that case.
I am trying to figure out if I can run my Ryobi fan on 12 volts. The fan will run on a Ryobi 18 volt tool battery OR direct 110 volt plug in. I think I will make a jumper and see if it will operate on 12 volts safely.
Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Thu Dec 31, 2020 6:29 pm
by flboy
I'd think and 18vdc fan would run on 12vdc, just a little slower.
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Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Thu Dec 31, 2020 6:32 pm
by John61CT
DC-DC "Buck" converter is what you need, from the higher V down to ~13V.
Make sure sized to handle 29+% more amps current than you will ever draw through it, a fuse will help with that.
Cheap ones usually don't have good OCP
Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Thu Dec 31, 2020 6:38 pm
by flboy
I'd just buy the 12vdc battery if you need the DC to DC converter. It is a drill battery with probably only 3 to 4 aH of capacity. Not much to work with and the converter will waste about 15% off the top.
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Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Fri Jan 01, 2021 7:54 am
by RJ Howell
Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Fri Jan 01, 2021 7:59 am
by RJ Howell
I used to get these batteries for free (so called dead) and harvest the cells. From that would build up my battery bank according the volt/ah I wanted. It was a great source for lithium 18650 batteries, especially FREE!!! Now folks are buying those batteries..
If these are just a couple you have around, go with the buck converter. If you getting a cheap supply, harvest and build to suit your requirement.
Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Fri Jan 01, 2021 1:15 pm
by yycwrangler
Re: 20 volt dewalt batteries 12 volt appliances
Posted:
Fri Jan 01, 2021 7:32 pm
by John61CT
Find out the max amps of the "12V" output
"can heat the coat" does not inspire confidence