65W versus 90W AC power adapters

732 · **Posted:** Sun Oct 12, 2008 2:56 am

First Light wrote:

I have a T42p with a 90w adapter and an X60s with a 65w adapter, and the plugs are different sizes on these two adapters. :?:

T42p has 4.5A*16V=72W; X40 has 3.25A*16A=52W
T60p has 4.5A*20V=90W; X60 has 3.25A*20V=65W

Wentworth · **Posted:** Sun Oct 12, 2008 8:14 am

Have a look at what JET means in terms product approval and testing:

http://www.jet.or.jp/en/faq.html

Radioguy · **Posted:** Sun Oct 12, 2008 5:39 pm

Sorry, forget I said anything. I just referenced one of my previous posts, and see the link that says my current 90W is a Lite-On. :roll:

I'd still like to know who makes my 65W one. If it's Lite-On, I may start worrying again.

AIX · **Posted:** Wed May 12, 2010 4:24 pm

Radioguy wrote:

OK, I have a 90W one now. It's 93P5026 / 92P1109. The word "JET" is on it. Is that the manufacturer? Are they good?

I'd still love to know the manufacturer of 92P1155 / 92P1156. It still ran hot to the last second.

I don't know if you found the answer or not - it's a Delta:

IBM AC Adapter 90W 20V

*Compatible FRU P/N:
*2-pin/prong model:
By Astec - FRU: 92P1106, 42T5000, P/N: 92P1105
By Liteon - FRU: 92P1110, 93P5026, P/N: 92P1109
By Sanken - FRU: 92P1114, P/N: 92P1113
By Delta - FRU: 42T5277, P/N: 42T5276

*3-pin/prong model:
By Astec - FRU: 92P1104, P/N: 92P1103
By Liteon - FRU: 92P1108, P/N: 92P1107
By Sanken - FRU: 92P1112, P/N: 92P1101
By Delta - FRU: 42T5275, P/N: 42T5274

INPUT: 100-240V~ 2.4A, 50-60Hz
OUTPUT: 20V 4.5A 90W

*This IBM Thinkpad 65W Ultraportable AC adapter has a few set of
FRU Part Number due to different manufacturer. There are all
similar and have the same specification.

*Compatible FRU P/N:
*2-pin/prong model:
By Delta - FRU: 92P1155,
By Liteon - FRU: 92P1159, P/N: 92P1160
By Astec - FRU: 92P1214

*3-pin/prong model:
By Delta - FRU: 92P1153, P/N: 92P1154
By Liteon - FRU:92P1157
By Astec - FRU: 92P1212

INPUT: 100-240V~ 1.5A, 50-60Hz
OUTPUT: 20V 3.25A 65W

Radioguy · **Posted:** Wed May 12, 2010 8:19 pm

Wow. Thanks for posting that. It's nice to know for certain.

Now I wonder whether Astec or Lite-On has the best build quality. The 90W was made for discrete graphics and docks, so I'd suppose none would run hot on my Intel T61 undocked, but I would still stay away from Delta. I also wonder if Delta was the default included OEM adapter mfgr.

Do current models also have adapters from these suppliers, or others?

IvanAndreevich · **Posted:** Wed May 12, 2010 8:45 pm

I think you are way too concerned over this. Do you leave the power supply lying on your crotch when gaming or something?

I would run any T6x machine with a 65W PSU any day. Use RMClock to lower the CPU voltage to lowest stable levels and the fan doesn't even turn on.

GrandMasterKhan · **Posted:** Thu May 13, 2010 2:19 am

Braddah, I use both the 65w and the 90w on a T61 with Nvidia card. If you got discrete graphics that is how they sell it with the larger brick. It's OK to use either. Only difference is one takes longer to charge and the other is lighter and easiser to carry around. I confirmed this with Lenovo. Neither one gets hot. If yours is hot its defective but I doubt it would sear your pants or blow up. That's paranioa and borders on insanity. Lenovo uses many suppliers and if it match their specs its OK. Good enough for them should be good enough for you or they wouldn't put their name on it. lol.

Radioguy · **Posted:** Fri May 14, 2010 3:03 am

IvanAndreevich wrote:

I think you are way too concerned over this. Do you leave the power supply lying on your crotch when gaming or something?

I would run any T6x machine with a 65W PSU any day. Use RMClock to lower the CPU voltage to lowest stable levels and the fan doesn't even turn on.

An oddly nonsensical reply considering my earlier posts. Yes, I could have fried an egg on the Delta 65W with a single external HDD attached. That was the reason I participated in this thread in the first place.

GrandMasterKhan wrote:

Braddah, I use both the 65w and the 90w on a T61 with Nvidia card. If you got discrete graphics that is how they sell it with the larger brick. It's OK to use either. Only difference is one takes longer to charge and the other is lighter and easiser to carry around. I confirmed this with Lenovo. Neither one gets hot. If yours is hot its defective but I doubt it would sear your pants or blow up. That's paranioa and borders on insanity. Lenovo uses many suppliers and if it match their specs its OK. Good enough for them should be good enough for you or they wouldn't put their name on it. lol.

Two in a row?, really odd.

Defective it may be, but again, I did speak of my previous experience with Delta earlier. I have formed an opinion.

Anyhow, they also included it with the Advanced (Mini) Dock (65W won't work, especially on a discrete GPU). Also, I tend to use the 90W now regardless, but I'm not the first to inquire about reported quality of a mfgr aside from personal experience. If you don't believe me, checkout the keyboard threads.

Thanks again to AIX.

AIX · **Posted:** Fri May 14, 2010 6:48 am

Radioguy you're welcome.
I have a 65W adapter (Astec), nothing particular with it, it's not hotter than my T41's 72W adapter. Anyway, I bought today a 90W adapter from ebay, it's more confortable to have 2 adapters than 1.

bass1175 · **Posted:** Fri May 14, 2010 12:18 pm

Mine also gets extremely hot to the point where it catches my attention. I make sure not to leave it near fabrics, it gets hot enough where I cant touch it. I never felt this way about my t43s adapter.

crashnburn · **Posted:** Sun May 16, 2010 11:12 am

awolfe63 wrote:

I have always been a conservative about this. In general, using an underpowered adapter can be a fire hazard. But in this case - I think it is a non-issue.

1) I can't push my W500 over 50W power consumption and that requires running games. In anything resembling office use - I can't push it over 40W. That would make the 65W adapter "safe" to use.

2) These machines can identify which adapter is plugged - so the battery charging circuit will not overdraw a 65W adapter.

3) An extra HD is only about 2.5W (*). Each USB is limited to 2.5W. - so an extra 5-7W is probably OK as well.

For <$50, I would be somewhat reluctant to take any chances - but it looks like in this particular case, there are safety checks in place to make it OK to use a 65W adapter. I am using a third-party 90W adapter from ebay that I bought for $20 and it works great.

(*) footnote - a spinning-up drive can draw up to 5.5W but this almost never happens when the GPU is in full 3D action so it does not contribute to the peak power draw.

awolfe63 wrote:

Unplug the computer.

You can then see the power draw in Power Manager. I use MOBmeter though because it produces a graph.

EvilH wrote:

You can also monitor power usage at the plug with a kill-a-watt. Picked one up at Fry's the other day for $20 and have been going around with it for the past week finding how much juice all vampire devices actually eat. Really quite fun and educational

Wow! I gotta try these to figure out power usage for my devices.

GrandMasterKhan · **Posted:** Sun May 16, 2010 12:49 pm

I have 2 90W ones and neither get hot. Warm sort of but not hot. It could be the wiring in your home. Are other bricks hot and do you have a high rate of failure on your electronics?

Radioguy · **Posted:** Fri Aug 13, 2010 5:55 am

GrandMasterKhan wrote:

I have 2 90W ones and neither get hot. Warm sort of but not hot. It could be the wiring in your home. Are other bricks hot and do you have a high rate of failure on your electronics?

Not whatsoever, and I said 65W, not 90W.

ParatoOptimal · **Posted:** Thu Sep 30, 2010 5:48 pm

Does the Lite-On one have the IBM part number?
I ofund one on ebay that has it's own model number with no IBM part number that is the correct V and W. It was originally bundled with a Micron laptop. I don't know the diameter of the connector.

rkawakami · **Posted:** Thu Sep 30, 2010 5:51 pm

Beside the diameter of the plug, you have to make sure that the polarity is the same (center pin +). If there's any doubt, then it's not worth playing eBay roulette.

efrant · **Posted:** Fri Oct 22, 2010 11:43 am

Radioguy wrote:

[snip]

An oddly nonsensical reply considering my earlier posts. Yes, I could have fried an egg on the Delta 65W with a single external HDD attached. That was the reason I participated in this thread in the first place.

[snip]

Two in a row?, really odd.

Defective it may be, but again, I did speak of my previous experience with Delta earlier. I have formed an opinion.

Anyhow, they also included it with the Advanced (Mini) Dock (65W won't work, especially on a discrete GPU). Also, I tend to use the 90W now regardless, but I'm not the first to inquire about reported quality of a mfgr aside from personal experience. If you don't believe me, checkout the keyboard threads.

Thanks again to AIX.

I also have been running my T60p (discrete graphics) with either a 65W or a 90W for over three years now (and sometimes with the advanced mini dock). Both the 65W and the 90W adapter work equally well. Both get hot, although the 65W may get a little bit hotter, but it is too dificult to tell. Have never had ANY problems running a T60p with a 65W adapter...

65W versus 90W AC power adapters

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