Question 1

What is the amp / wattage of the "always on" usb charge port on the back? is it 1 amp or 2 amp or more?

Accepted Answer

this is the info for the ac adapter : 
overview for 
ThinkPad 230W AC Adapter (slim tip) (4X20E751
11)
Keep a spare ThinkPad 230W AC Adapter at hand to ensure your ThinkPad has 
a  consistent  flow  of  power.  Keep  one  adapter  in  the  office,  one  at  home  and 
another  in  your  carrying  case  for  immediat
e,  convenient  access  to  power.  This 
ThinkPad  AC  adapter  is  perfect  for  use  as  a  spare  or  replacement  adapter  for 
compatible  laptops.  It  is  compatible  with  all  Lenovo  laptops  with  the  rectangular 
“slim
-
tip” common power plug. It is not compatible with legac
y notebook systems 
with  the  round,  barrel
-
type  power  plug.  ThinkPad  AC  adapters  are  compact  so 
you can easily keep a spare tucked into your carry case at all times. This 230w 
adapter will perform to the exact same standard as the one which originally came 
with your laptop. It is highly energy efficient and is backed by an official Lenovo 
1
-
year warranty.
PERFORMANCE SPECIFICATIONS

AC
o
AC type:  Universal Input, Worldwide Agency Support
o
AC input voltage:  100 V to 240 V; 50/60 Hz
o
Input connection:  Includes
standard AC power cord
PHYSICAL SPECIFICATIONS

Approximate height:   
25
mm (
0.98
in)

Approximate width:   
98
mm (
3.86 
in)

Approximate length:   
198 
mm (
7.8
in)

Weight:  
775
g  (
1.71
lb)
Package dimension:
Approximate 
dimension: 
380*150*54
mm 
(1
4.
96 
x
5.91
x2.
13
in)

Weight:  
1000
g  
OPERATING ENVIRONMENT

Temperature:  5 to 40 deg C (41 to 104 deg F)

Relative humidity:  8% to 80% non
-
condensing

Storage Temperature:  
-
31 to 60 deg (C) (
-
40 to 140 deg (F))

Question 2

Can this drive three monitors?

Accepted Answer

See https://support.lenovo.com/us/en/documents/pd029622 for details on all possible monitor combinations supported by the Dock and a P50 or P70. Note that it is possible to have up to five displays supported using Thunderbolt.

Question 3

Does it work with the p72s?

Accepted Answer

Yes I do believe it will work with a P72s

Question 4

Description states a 90w power supply, why not a 230w?

Accepted Answer

I do not see 90 W. This is the description from Amazon Thinkpad AC Adapter (230W) Compatible with P50, P51, P70, P71 (not compatible with S-models) for this item Lenovo Thinkpad 230W Workstation Dock - 40A50230US (Compatible with P50, P51, P70, P71 Models

Standing screen display size	2 Inches
Screen Resolution	3840 x 2160
Max Screen Resolution	640 x 480
Number of USB 3.0 Ports	6
Brand	Lenovo
Series	40A50230US
Item model number	40A50230US
Item Weight	2.16 pounds
Product Dimensions	6.5 x 15.8 x 2.2 inches
Item Dimensions LxWxH	6.5 x 15.8 x 2.2 inches
Color	Black
Manufacturer	Lenovo
ASIN	B019K6ET24
Is Discontinued By Manufacturer	No
Date First Available	October 28, 2015

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Lenovo Thinkpad Workstation Dock 230W US (40A50230US)

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