Lightweight power supply for X series?

[silo]

I read about a "lightweight adapter" for the X series on another thread here, only the writer did not specify what he was talking about.

I have an X22 and just bought an X32.

my x22 uses a smallish power brick (IBM FRU P/N: 02K6557 input 100-240V ~ 1.2A-0.5A 50/60Hz Made in China). My T30 uses a significantly larger power supply.

But, is there another "lightweight charger" that is lighter than this one (the brick itself weighs about 6.5 oz, not incl cords).

[rvehock]

The IBM/Lenovo webpage has the following:

ThinkPad 56W Ultraportable AC Adapter

A second AC Adapter provides power convenience when you need it. The ThinkPad Ultraportable 56w AC Adapter can be used with many ThinkPads, the ThinkPad Port Replicator or the ThinkPad Multiple Batter Charger. Spare adapters at home, work and for travel make power access convenient and tailored to your needs.

General
Model name 02K6880
Description ThinkPad 56W Ultraportable AC Adapter
Web Price* $39.00

Architecture
Depth Metric 104 mm
Depth US 4.1 in
Height Metric 27.5 mm
Height US 1.1 in
Weight Metric[2] 0.240 Kg
Weight US[2] 0.53 lbs
Width Metric 50 mm
Width US 2 in

Accessories
A/C adapter 56 watt

Power management
Description 56 watt
Cable Length 1.8 m
Connector Description 2-pin DC
Form Factor External Brick
Input Voltage 100 thru 240 VAC
Output Voltage 16 VDC

Limited warranty[7]
Limited warranty period One year

Weight & dimensions
Depth 4.1 in
Height 1.1 in
Weight[2] 0.53 lbs
Width 2 in

Power management
Power management 1
Power 56 W
Power supply type 100-240 volt AC
Power management 2
Power 56 W
Power supply type AC

[aamsel]

That's not the adapter that was referred to, although I don't know the actual one that was either.

Andrew