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If you keep the battery in and it is charged. If you try to operate the laptop and charge the battery at the same time, then I see smoke signals on the horizon. LER's (light emitting resistors) and SED's (smoke emitting diodes) are not fun in laptops... you're talking about 5 watts rated difference. 5 watts of heat are quite a lot - keep the adapter well cooled. incidentally, is that the 701 adapter with the fold-out prongs? I really liked the size of it, but when mine died, they gave me a bigger one that additionally requires a standard power cable. but it is rated at 2A, I believe. i'll trade you... above doesn't apply if you always carry around a spare laptop, of course. axel On Friday, May 22, 1998 2:51 AM, David Ross wrote: %The usual rule of thumb is that you should move to more amps, instead of %less. However, if you keep the battery in this should serve as a buffer and %it should work OK. % %The above paragraph is for entertainment value only, and should not be %construed as advice; in particular, I disclaim all responsibility for any %damage that might result from following it! % %David A. Ross [...] %My ThinkPad 701 C uses an AC Adapter (P/N 04H6136=FRU04h697) which has %an output of 16 volts, 1.8a. % %My new 380ED uses an AC Adapter (P/N 85G6709 = FRU#11J9992)which has %an output of 16v, 2.2a % %The plugs into the computer are exactly the same. The 701C has either %an NiCad or NiMh battery; the 380ED has an LiIon. % %You probably see the question coming: Can I use the 701C adapter on %the 380ED, despite the slightly lower amperage? What are the %electrical/electronic considerations here? I understand the warranty %considerations should I decide to do so. ............................................................................ . Axel Hartmann . . Paper'n'People : 33 Meadow Street; Amherst, MA 01002; USA . . Voice : +1 (413) 549 - 6113 , Fax on demand . ............................................................................ . Office : Dept. of Chemical Engineering; UMass; Amherst, MA 01003 . . Office Phone : +1 (413) 577 - 1235 Fax: +1 (413) 545 - 1649 . . E-Mail : axhartma@risky.ecs.umass.edu . . Homepage : http://rheoserver.pse.umass.edu/users/axel/index.html . ............................................................................