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I have never taken the battery cables off a battery and use one of those new boosters hooked to the cables, and then try to start the vehicle (like some of those commercials show) BUT the current needed to start any vehicle passing through the wires on those newer boosters will IMHO melt way before the vehicle starts or runs. IMHO these newer flat pack boosters like a 'jump start battery box' (older tech, just a 12v battery usually an AGM type), the newer small flat battery 'boosters' are designed to raise the system voltage (as a bad cell severely limits the ability to move the available current at the lower voltage), and then current in the 'bad battery' is supplemented some at the 12+ volts provided by these newer 'flat-ish boost boxes'. Remember, none of these AGM or Li small flat 'boosters' can jump a vehicle if the battery is shot. Ever wonder why these new li flat packs have very thin wires? Again, they mostly boost the VOLTAGE to the point the remaining CURRENT in the installed battery can 'move' to start the vehicle (with limitations).

Has anyone tried to start their vehicle(s) without a battery connected (as those commercials seem to demonstrate?). I would like to know as I do not believe they have the ability to. Whomever does, make a video and post it to this post? I would not do it on a crossfire though, or newer vehicle with all the electronics nowadays, newer vehicles have a funky enough complicated electrical system.


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