Thinkpads Forum

I need another genuine lenovo ac adapter for my two T61 laptops....

As I review ebay and amazon for used lenovo 90w 20v 4.5a adapters it seems they come in a number of different model numbers including
92P1105 92P1109 92P1113 92P1110 92P1114 92P1106 45N0201 45N0202 and others
some used lenovo adapters are made in indonesia, some in china
some are more expensive than others but the avg price for a used genuine lenovo 90w yellow tip is around $15

Can anyone please tell me if all genuine lenovo 90w 20v 4.5a adapters ARE INTERCHANGEABLE ?
By this I mean no matter which one I buy used it will work properly to run and charge the battery with my T61 laptops

Of my current adapters, one is made in China, one in Indonesia. One runs hotter than the other.
I'm told there have been problems in the past with excessive heat in some models.

NOTE: I am ONLY TALKING ABOUT genuine lenovo adapters NOT REPLACEMENT NON-LENOVO adapters.
I am NOT interested in non-Lenovo replacement ac adapters.

Thanks in advance,

I've not observed any issues with charging or performance between any of the Lenovo A/C adapters I've come across (quite a lot).

Of my current adapters, one is made in China, one in Indonesia. One runs hotter than the other.

Maybe the efficiency rating http://www.energystar.gov/ia/partners/p ... otocol.pdf is different between the two units.

The 65w AC adapter that came with my X61 has a IV rating, while the newer one with my X220 is a V.
The older one seems a bit hotter.

The only difference between the (genuine) chargers is, that some have an 8-shaped 2-prong power cord, and others have a "Mickey Mouse" 3-prong power cord.
The same applies for 65W and 90W chargers.
USA usually has the 2-prong varieties.
And of course different countries require different socket-plugs.

That and the design of the stress reliefs and "lenovo" embossing is a little different.