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Guru
Posts: 112
Registered: ‎06-12-2009
Location: NO
Views: 2,546
Message 1 of 12

P52s Charging

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?

Retired Support Specialist
Posts: 156
Registered: ‎08-02-2018
Location: US
Views: 2,398
Message 2 of 12

Re: P52 Charging

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_Specification....



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Guru
Posts: 112
Registered: ‎06-12-2009
Location: NO
Views: 2,335
Message 3 of 12

Re: P52 Charging

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.
Community SeniorMod
Community SeniorMod
Posts: 9,675
Registered: ‎01-01-2010
Location: US
Views: 2,311
Message 4 of 12

Re: P52 Charging

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.

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

I am not an employee or agent of Lenovo.
Guru
Posts: 112
Registered: ‎06-12-2009
Location: NO
Views: 2,177
Message 5 of 12

Re: P52 Charging

I do, this one:
https://www.lenovo.com/us/en/accessories-and-monitors/chargers-and-batteries/power-banks/USB-C-Lapto...

Guess what, that doesn't work either Smiley Happy

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 Smiley Sad
brelijah07
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Posts: 3
Registered: ‎02-26-2017
Location: US
Views: 921
Message 6 of 12

Re: P52 Charging

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 thingSmiley Sad very dissapointed.
Community SeniorMod
Community SeniorMod
Posts: 9,675
Registered: ‎01-01-2010
Location: US
Views: 900
Message 7 of 12

Re: P52 Charging

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


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.

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

I am not an employee or agent of Lenovo.
brelijah07
Fanfold Paper
Posts: 3
Registered: ‎02-26-2017
Location: US
Views: 882
Message 8 of 12

Re: P52 Charging

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.

Community SeniorMod
Community SeniorMod
Posts: 9,675
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Location: US
Views: 836
Message 9 of 12

Re: P52 Charging

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


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.

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

I am not an employee or agent of Lenovo.
Community SeniorMod
Community SeniorMod
Posts: 9,675
Registered: ‎01-01-2010
Location: US
Views: 831
Message 10 of 12

Re: P52 Charging

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


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.

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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