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On Sat, 13 Dec 97 23:39:17 HST, David Ross wrote: >> Hmmm. Interesting idea David, but I suggest that you compare the Amps >> and voltage to that of the ThinkPad's adapter first. And also check the polarity. >> You can do this with a voltmeter or multimeter. > >Paul, I think you miss the point. I don't intend to plug the battery >straight into the power jack on the laptop - this would certainly not >work (since the TP wants 16 volts). My idea is to connect the external 12 >volt battery to the TP through a TP automobile adapter. > Sorry, I apoligize for not throughly understanding. Okay, I suppose you might be able to try it, but I don't know how long the battery will last, though, since I'd imagine that the ThinkPad needs a fair amount of power, since it might also need to recharge the battery as well. Paul