AC Adapters interchangeable?

[rpfauth]

I just got a new T530 and noticed that the AC Adapter appears to be very similar to the one I have from my old T60. Does anyone know whether the old adapter will work (safely of course) with my new computer? Thanks.

[BillMorrow]

yes, they should fit..
to be sure check the output voltage..
both should be 20 volts DC

welcome to the forum..

[rkawakami]

I'd have to say that it all depends on the T60 model you had and the new T530. Both systems were spec'ed with either a 65W or 90W adapter. The difference is due to the graphics system that's on the motherboard. If your T60 has/had the ATI graphics, then the system should have come with the 90W adapter. However, if the T60 used an Intel graphics chip, then a 65W adapter was standard equipment. The T530 is setup similarly; Nvidia chip = 90W, Intel chip = 65W.

Look carefully at the labels on both adapters. Both should say 20V. They should also have a 65W or 90W stamped on it somewhere. It's perfectly fine to use a 90W adapter on a system that only requires the 65W. However, the reverse is not true. You should not use a 65W adapter on a system that is spec'ed at 90W. At best case, the laptop should recognize that you have the lower-wattage adapter connected and will probably throttle down the speed and/or charge your battery slower. At worst case, you run the risk of overworking the adapter which could potentially cause it to run hotter than normal.