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first of all, the Lind is the only adapter that WILL let the battery charge.... I had a dell 700m with the large barrel connector... the Lind works 100%...
since I swapped out the dell for a gateway that also needed 19v, but had a different plug, I cut the plug off of the lind.... it uses 3 wires of course, but it's weird.. it has like 2 different voltage feeds, & I think one has a ground level that is 5v above the other... I didn't spend a lot of time analyzing it, cause when the 2 outputs are summed, the end result is 19v, which suited my purpouse....
I don't think there is any communication, just a weird voltage configuration.... either way, if charging the battery isn't important, then the p1900 will definitely do the job... otherwise get a lind adapter for your model & it'll charge 100%....
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