-1

I would like to power 12V 32W air mattress pump from power bank. Power bank output is 5V and this is not enough (correct me if I'm wrong)

I see two ways:

  1. Using DC-DC converter. I found one XL6009E1 in local shop. It is max 10W. So, I think I need several of them connected parallel to
    power bank and pump. Will it work?
  2. Use two power banks connected in serial way. In this case I suppose to get 10V. What if these power banks are different models?

Which method is better? Where I need to pay attention in both methods?

  • Hello, and welcome to Home Improvement SE. This isn't really the type of question that's on topic here. – Daniel Griscom Jun 28 '16 at 10:53
  • Electrical Engineering SE might be the place. – BrownRedHawk Jun 28 '16 at 12:48
1

several [10W DC-DC converters] connected parallel to power bank and [mattress? inflation?] pump. Will it work?

That is the wrong way to approach the problem.

Use two power banks connected in serial way. In this case I suppose to get 10V. What if these power banks are different models?

That is the wrong way to approach the problem.


I would purchase a single DC-DC converter with 12V output and a rating of more than 32W.

I would attach this to a single "powerbank" (i.e. battery) rated at least 40W+. For a 5V powerbank 40W+ is 8A+ so use thick wires!

  • I can't find converter from 5V to 12V with such power? What will happens if I will go in both workaround ways from theoretical point of view? – vico Jun 28 '16 at 9:51
  • 3
    @vico - As RedGBrick has said the work arounds are not the way to do it. More bluntly do not do it. You should get off the idea of using a power bank anyway. These are meant for charging USB devices at typically 2A max. These things will not power the DC-DC converter even if you could find a suitable one. As RedGBrick has said such converter for a 5V input would require at least 8A input current at 5V. Get yourself a decent 12V sealed lead acid battery instead. A 12V 7AH battery should serve you well. No converters needed. Wall wart chargers for same available too. – Michael Karas Jun 28 '16 at 11:53
  • You are asking the equivalent of how to melt steel with a lighter. It won't work as one of two things will happen first: 1) you'll run out of fuel, or 2) the entire thing will melt down in your hand trying to provide that much power. – longneck Jun 28 '16 at 14:51

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.