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Jesus, nm, I will not build this device. And next time I need to build something I'll just do it and figure it out. I'm very aware of all the safety issues involved. I'm also a welder and I know what weight requirements things r and require. This was my first post on this forum, and I'm pretty...

Thank sir, u and geobruin have been the most help in this discussion in my opnion with the battery solutions and math. U guys r why I came here!

Thank u very much for the second time for ur legal advise. BUT, I do belive this is not a legal advise forum, nore was any of my questions in the origional post about liability or osha or any of that. I know and have plenty of individuals I can call and get this type of advise from IF I so...

U know so much more about batteries than I do, I am not as familiar. What size MAH battery would I need? I belive I understand that C rating is the amp rating I think based on earlier posts. I'm not sure how I could use the "ah" to translate the MAH so I know what type of battery to look for...

I have thought about that idea first and foremost because it takes the least path of resistance. But it does not suit what I need, wich was the origional post. I'm very happy for all of the ideas but I would like to stay on track to solving the solution to the origional post. I want to make a...

Literally the whole point of this was to make a light weight version of the origional plug in all steel ladder crane. I was going to make an aluminum frame version that used a battery pack. I know I can't cave much weight of thw hoist but the power pack and frame I'd where the weight can be...

I definitely appreciate all the data and advise. I'm aware of all the fun legality involved, that's why I alone the owner would be the only one using it and just for small jobs like a 3 ton condenser at max or a compressor. I'm on here to see how "practical " or even "possible" it would be and...

That u gor ur suggestion with the LiFePO4 12v, the one down side that wount work for this application is it needs to be portable and not very heavy, this battery is basicly the size of a motorcycle battery in my opnion and that just wount work, I need at biggest a battery for a tool.

Thanks for the info on the jump starter, I'm guessing it has a high amp buck converter built in if it takes 18v to 12v, I'll most likely get that and utilize it. I am not married to any one idea yet, I did not purchase or make anything because I have done that before and wasted a lot of time and...

Thanks for the info so far. This is what I wanted to bounce off others. I also had thought I "might be able" to use one of them hot wheels buck converters u were just referring to on Amazon, they r only rated to 20 amps max. Not sure if they make a buck converter capable of doing 35 amps max. I...

Hello, this is my first post. I own an HVAC-r company in Florida and I saw this guy's invention called the ladder crane. For reference to what I'm attempting to build u can find it at laddercrane.com . I want to make one like this, only I want to make it from light weight aluminum (wich I don't...