DrAwesomer 9 July 3, 2012 Share July 3, 2012 I just watched a video of someone making a portable car charger (Car charger as in the small outlet in your car) with a car battery. I have REALLY weird ideas, so after I watched the video, I thought of making something similar, except inside a backpack. I have an electric chainsaw, and I use it to cut wood in the back yard. However, the wood in the back yard is more than 250 feet away from my house, so I have to get a bunch of extension cords just to run it. I figured a portable power source would be much easier than dragging 5 50ft extension cords out into the back yard. Of course, if I was just going to use it for that, then I wouldn't build it. It could also be used when the power goes out, to power a few important things in my house. I'd have to make a few modifications to the portable car charger. For example, I'd have to make it more powerful. the chainsaw needs about 14 amps, and the car charger only gave out 5-10 amps, depending on which fuses you used. I'd also have to make it a regular 3-prong outlet, instead of the car style outlet. Most importantly, I'd have to get it all inside a backpack. Feel free to post ideas. I'll need them. Link to comment Share on other sites More sharing options...
null123456 759 July 3, 2012 Share July 3, 2012 3 Link to comment Share on other sites More sharing options...
A Blithering Div 247 July 3, 2012 Share July 3, 2012 Ummm, I don't think you'll fit it inside a backpack. First, the smallest batteries you could use that would supply that kind of amperage over an extended period are sealed lead acid batteries from motorcycles and second, the size of the inverter needed to produce that kind of power (as your chainsaw runs off of AC) would easily take up a backpack. The backpack itself would weigh a ton and the batteries wouldn't last long both in charge life and in cycle life. If the backpack is optional, then you'd need a deep cycle battery that could push at least 160 Amp hours. which would both cost a lot and weigh even more. The easiest solution for you would be a gasoline powered chainsaw. Link to comment Share on other sites More sharing options...
DrAwesomer 9 July 3, 2012 Author Share July 3, 2012 Yeah, I didn't think I'd be able to do it. I'd be better off with a gas chainsaw. Thanks for the advice. Link to comment Share on other sites More sharing options...
I used to be a stranger 7,989 July 3, 2012 Share July 3, 2012 I've heard of people inventing flexible solar panels. They want to be able to have solar cells that behave like fabric, so they can make a jacket ouf of it. Then you can charge your cell phone by plugging it into your pocket. 1 Link to comment Share on other sites More sharing options...
DrAwesomer 9 July 3, 2012 Author Share July 3, 2012 I've heard of people inventing flexible solar panels. They want to be able to have solar cells that behave like fabric, so they can make a jacket ouf of it. Then you can charge your cell phone by plugging it into your pocket. Interesting. I'll have to take a look at one of those. Link to comment Share on other sites More sharing options...
Jonesy 40 July 3, 2012 Share July 3, 2012 i strongly suggest not doing that, you could get hurt or even worse killed if it REALLY didnt work, your better of with a small generator 1 Link to comment Share on other sites More sharing options...
DrAwesomer 9 July 3, 2012 Author Share July 3, 2012 (edited) i strongly suggest not doing that, you could get hurt or even worse killed if it REALLY didnt work, your better of with a small generator I found a website that sells small generators. Small enough to fit in a backpack. I might get one of those and make a few holes in the backpack to get the cords in. Edited July 3, 2012 by DrAwesomer 1 Link to comment Share on other sites More sharing options...
Jonesy 40 July 3, 2012 Share July 3, 2012 I found a website that sells small generators. Small enough to fit in a backpack. I might get one of those and make a few holes in the backpack to get the cords in. Ya that would work just dont screw with the generator itself that usually ends bad Link to comment Share on other sites More sharing options...
cuteycindyhoney 13,284 July 4, 2012 Share July 4, 2012 I found a website that sells small generators. Small enough to fit in a backpack. I might get one of those and make a few holes in the backpack to get the cords in. I really don't think carrying an operating generator on your back is very safe. Please think twice about doing that! I do not want to see you on the Darwin Report website! Link to comment Share on other sites More sharing options...
A Blithering Div 247 July 4, 2012 Share July 4, 2012 Keep in mind that provided you're on a 120 volt electrical system, your chainsaw is using ~1.7 kilowatts of power. So you'd want something that's 2 kilowatts or more to reduce stress on the generator. Link to comment Share on other sites More sharing options...
cuteycindyhoney 13,284 July 6, 2012 Share July 6, 2012 Please consider buying the right tool for the job! Why talk about spending possibly hundreds of dollars to try and make due with an electric chain saw, when you can buy a gas powered one for under a hundred bucks? You're inviting disaster! http://www.vminnovations.com/Product_2086/.html Link to comment Share on other sites More sharing options...
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