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pabloe23
Blue Screen Again
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Registered: ‎03-24-2017
Location: US
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Message 1 of 9

T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

Hi All,

 

I have a Lenovo T440p , the original charger is 20v 2.25a = 45W with Square pin.

 

But I want to use as second charger the following:

20V 3.25 (65W) with circle pin (from a T420) + adaptar from circle pin to square pin.

 

is possible to use a 65W charger?

 

thanks!

Community SeniorMod
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Message 2 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

Hello and welcome

Yes, that'll work



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JDGillis
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Message 3 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

Actually the T440p shipped with up to a 135W adapter in some configurations, but it is not the wattage you need to be concerned with, just the output voltage and amperage, which for the 65W version (FRU 45N0256) was also 20V and 3.25A, so as long as your adapter is OK, then it should work.

 

 

T440p parts list

https://download.lenovo.com/parts/ThinkPad/t440p_frubom_20160614.pdf

pabloe23
Blue Screen Again
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Location: US
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Message 4 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

Thanks to both!

kstrid
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Message 5 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

There are chargers with 45, 65, 90, 110, 170 watts. Perhaps more. Have all the the same voltage/ampere so I can use any of them?

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Message 6 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?


@kstrid wrote:

There are chargers with 45, 65, 90, 110, 170 watts. Perhaps more. Have all the the same voltage/ampere so I can use any of them?


That will depend on the laptop model.  Those are probably all 20V chargers (assuming you're asking about recent Lenovo adapters) but the current available will vary.

 

Laptops with high wattage requirements will sense a lower-capacity charger and refuse to charge.  Lower-demand models (65W for instance) may accept a 45W charger - and perhaps seem to charge or run - but may have problems with voltage sag, and/or the charger will go into over-temp or over-current shut-down.

 

In general it's not a good idea to try to charge a laptop with a lower-spec charger.

 

Z.


The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.


The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may benefit. ... GeezBlog

 

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kstrid
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Message 7 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

ok but not the opposite? higher-spec charger?

Community SeniorMod
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Message 8 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?


@kstrid wrote:

ok but not the opposite? higher-spec charger?


That should be OK.

 

Z.


The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.


The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may benefit. ... GeezBlog

 

  Communities:   English    Deutsche    Español    Português    Русскоязычное    Česká    Slovenská    Українська   Moto English

kstrid
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Message 9 of 9

Re: T440p with 20v 2.25a (45W) charger as original, but can I use 65w charger?

thx

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