For anyone interested, I designed an all singing all dancing jump starter for a company that had an integrated Buck/Boost converter for charging and had 2 x 12V high capacity batteries (for their size) - about 44AH each. They were switched in series or parallel for 12 or 24V systems. Obviously you will only start a truck a few times before you won't anymore :-) but the concept does work.
Now here's the problem, an average car battery lasts about 3 years+. The batteries in the jump starter will likely last only 2 years because they don't get cycled, so in 3 years when you next need your jump starter, you may just need to borrow someone's jump stater :-) They're a great idea for mobile mechanics and the likes, but not really for an individual. In fact the Kia you have is probably a better option for your truck and vice verca :-) That said if you use it frequently for emergency light and power the usefulness equation is a little different.
In typical battery has enought energy to start engine after keep headlights on for few (not many) hours. This device is mainly used only to start engine, for this needs only to supply few seconds of 100-200A current. In this case big battery is not required, small will be enough if have small internal resistance.
My Stanley is my neighbour's car :-) I called upon his car's services on a couple of occasions in the past 3-4 years to jump start my car's engine. On both occasions, I left the flood lights on over a week-end :-(
What I don't "get" is that obviously the battery in your "stanley" is not that big - around 25 Amp hours at most, much less than the normal battery, so how do they manage to crank a big engine like your truck? Are they special batteries? Anyone know about these things?
It' snot light, but the furthest I will have to carry it is from the floor of the truck to the power socket in the garage (unless there's a power cut, in which case I will take it into the house) ... but that's no "biggie"
The first time you plug it in it says to charge it for 40 hours. After that to top it up once a month.
I keep it in my truck on the floor in the back. I'll top it up the first weekend in the month (I do a bunch of stuff the first weekend like changing the air filters in the house -- always doing things that first weekend makes it easy to remember things)
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