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119 Posts

06-12-2009

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P52s Charging

2018-12-11, 8:32 AM

I love my P52, even if it throttles the CPU a little too easy. 

 

What I don't love is that is won't receive any charge with a 90W adapter or USB-C unless it's hibernated or turned off (and not always then either). 

Previous models would give a message that it's not sufficient and use some battery to compensate, but now I have to drag a huge 170W adapter to meeting rooms at work, which are prewired with 90W which should give me more than enough hours on 90W plus battery to last all day. 

 

Is there a good reason to not support these ways to charge?

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12317 Posts

01-02-2010

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Re: P52 Charging

2019-01-17, 16:50 PM

I have been using W and P series since W520 (maybe w510?) and they wouldn't start without a large adapter connected.  You could plug a 90w is after it was running and I believe there would be no protection against overloading the adapter (fire or overheating possibility) or damage to the laptop's internal power circuitry.  If you need additional run time, I suggest carrying an extra battery.


Rich


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156 Posts

08-02-2018

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Re: P52 Charging

2019-01-10, 14:29 PM

Hello sveintore! Welcome to Community Forums.

 

What is the wattage of the AC adapter that came with your machine? Based on the product specifications, the machine's AC adapter is 170W slim tip AC adapter and USB-C doesn't support power delivery. You may refer to the specs here https://psref.lenovo.com/syspool/Sys/PDF/ThinkPad/ThinkPad%20P52/ThinkPad_P52_Platform_Specifications.pdf.



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119 Posts

06-12-2009

Norway

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Re: P52 Charging

2019-01-17, 10:06 AM
Yes, I have both 170 and 135(?) Watt adapters. Both working. But I'm a bit annoyed that I have to bring those lumps with me to meeting rooms or on trips. Earlier models in the W-series could put the 90 Watts from the 90 Watt adapter into the battery and delay the battery depletion.
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12317 Posts

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Re: P52 Charging

2019-01-17, 16:50 PM

I have been using W and P series since W520 (maybe w510?) and they wouldn't start without a large adapter connected.  You could plug a 90w is after it was running and I believe there would be no protection against overloading the adapter (fire or overheating possibility) or damage to the laptop's internal power circuitry.  If you need additional run time, I suggest carrying an extra battery.


Rich


I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

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0 person found this solution to be helpful.

This helped me too

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119 Posts

06-12-2009

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Re: P52 Charging

2019-01-30, 8:51 AM
I do, this one:
https://www.lenovo.com/us/en/accessories-and-monitors/chargers-and-batteries/power-banks/USB-C-Laptop-Power-Bank-WW/p/40AL140CWW

Guess what, that doesn't work either :)

But I still love the machine, but we won't be buying more of them to use at the office, because of these limitations.

A 90W adapter would deliver 90W and not be overloaded (but indeed running hot).
A extra battery for the computer would be same weight/size as the power adapter so no big help there :(
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02-27-2017

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Re: P52 Charging

2019-06-25, 9:12 AM
I'm so lost . Where are you plugging a slim tip into exactly on a p52. There is no place that even resembles the connection for a slim tip on mine. I've been using the charger that cam with it and it only shows 15 w. This laptop has been a disaster and I've basically went back to using my w530 since I cannot keep a charge on this thing:( very dissapointed.
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12317 Posts

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Re: P52 Charging

2019-06-25, 14:52 PM

Power connector is in the rear.  15-watt charger???  There is no such thing.


Rich


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Re: P52 Charging

2019-06-25, 16:43 PM

There isnt any charging port in rear of my p52 20LB model. Talked to support today and they told me it is the board that regulates or sensed the wattage that is faulty and that I need  to send to the laptop to the repair  depot for repair to fix this.

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12317 Posts

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Re: P52 Charging

2019-06-25, 20:07 PM

The 20LB is a P52S which is an entirely different model.  P52S has an ultra-low power (15-watt) CPU while the P52 uses a 45-watt H-series processor.  The P52s does not have a slim-tip power port, but uses USB-C charging.  The P52 and P52s have similar names, but they are very different electronically.

 

I am editing the subject of the thread so it makes sense.


Rich


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  • Message 10 of 12

Re: P52 Charging

2019-06-25, 20:16 PM

I will try to answer the question assuming a P52s.  Are you using some kind of adapter to convert to USB-C?  I didn't think there were 90-watt USB-C power supplies and I know there are not 135W or 170W.  As far as I can tell, your machine needs a 65-watt adapter.  The USB-C power delivery spec is complicated and I have seen or heard of no conversion adapter that works.  You need to use the otriginal charger that came with your machine or an identical.


Rich


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If a response answers your question, please mark it as the accepted solution.

I am not an employee or agent of Lenovo.
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