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kivnic
Posts: 13
Registered: ‎01-29-2009
Location: USA
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Use a 90W power supply with T400s?

I just got a tiny T400S, which comes with a small 65W power adapter, 3.25A output. My last machine was a larger W500, with 90W adpater and 4.5A output. Can I use my old 90W adapters on the new T400S machine?

 

My theory is that the larger adapter simply has the potential for more power, but that it won't hurt the smaller laptop since that machine should only pull what it actually needs. Can someone confirm this? I don't want to risk damaging the new machine.

 

Thanks!

IPnaSh
Posts: 2,402
Kudos: 369
Solutions: 126
Registered: ‎06-05-2010
Location: Rosario, Santa Fe, Argentina
0

Re: Use a 90W power supply with T400s?

I think that you can, because 90 W is the maxium power given by that power adapter. It's not constant of course. Also, it can handle more current.

 

The power adapter will feed every electronical component as their demands.

 

The most important thing is the voltage (in this case is the same).

 

Best regards.

IPnaSh
First Spanish Community Guru - Colaborador ad honorem

Lenovo
lead_org
Posts: 20,892
Topics: 128
Kudos: 1,249
Solutions: 1,339
Registered: ‎12-19-2008
Location: Australia, Melbourne
0

Re: Use a 90W power supply with T400s?

Your T400s can use 65 w, 95 w and 135 watt adapter (from a W510). Current supplied is not constant, but voltage is... 

 

Power = Current x Voltage.... 

Regards,

Jin Li

May this year, be the year of 'DO'!

I am a volunteer, and not a paid staff of Lenovo or Microsoft