T42 Charger Question

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raket · #1 Post by **raket** » Mon Sep 10, 2007 9:24 am

Will a charger for IBM Thinkpad A20p work with Ibm Thinkpad T42?

pianowizard · #2 Post by **pianowizard** » Mon Sep 10, 2007 9:27 am

Any Thinkpad adapter with 16V and 4.5A output works with the T42p. This information is printed on the bottom of the adapter.

raket · #3 Post by **raket** » Mon Sep 10, 2007 9:49 am

Ok. my T21 Charger 16V/3.5A worked for the T42 aswell but it went VERY hot.

pianowizard · #4 Post by **pianowizard** » Mon Sep 10, 2007 9:52 am

raket wrote:Ok. my T21 Charger 16V/3.5A worked for the T42 aswell but it went VERY hot.

Don't use that adapter. See this thread.

raket · #5 Post by **raket** » Mon Sep 10, 2007 10:17 am

ok updated.

A20P AC-Adapter is 72w (16V/A3.5?)

Part number is of the A20P adapter is one of the following:

02K6669
02K6673
02K6677
02K6666
02K6670
02K6674

(Donno if that's a Zero (0) or a O)

Is there any way to know if any of these ac-adapters actual fits in a T42?

awolfe63 · #6 Post by **awolfe63** » Mon Sep 10, 2007 3:39 pm

Don't do it. It will fit and it will probably work - but there is a fire hazard due to the overload.

Used T4X adapters are easy to get on ebay for $20 shipped. I have 6 or 8.

#7 Post by **richk** » Mon Sep 10, 2007 4:11 pm

the 3.5 amp charger will power the machine until it burns out, but will not charge the battery.

#8 Post by **bill bolton** » Mon Sep 10, 2007 6:21 pm

raket wrote:A20P AC-Adapter is 72w (16V/A3.5?)

16V*3.5A = 56 Watts

A 56W power supply will run some T4x configurations without any drama, but will struggle on others.... it really depends on the exact T4x configuration. In general, its not a great idea to use a 56W power supply with T4x ThinkPads.

Cheers,

Bill B.

awolfe63 · #9 Post by **awolfe63** » Mon Sep 10, 2007 6:28 pm

I've always wondered about this. No matter what I do to my T42 - I've never been able to get the power consumption over 30W. A 56W adapter does get hot though.

#10 Post by **richk** » Mon Sep 10, 2007 7:10 pm

More memory, bigger screen, wireless, bluetooth, etc all translate to more power

raket · #11 Post by **raket** » Mon Sep 10, 2007 7:44 pm

How ridiculous.. that 3.5A is REALLY a TYPO. It States from the Manual that's A20P ships with a 72w thus it should be 4.5A and _NOT_ 3.5A.

What i wanted to know what if the connector from this charger FITS in the T42

My old T21 Charger Does NOT fit in my X41.
T21 Charger fits in T42.
T42 Charger fits in X41.

Please lock this thread till i get the Charger for my A20P to test it in my T42.

Thank you for the explanation Bill.

#12 Post by **richk** » Tue Sep 11, 2007 12:07 am

The connectors are the same. I thought you were asking about 3.5 amp chargers, which also fit, but don't work right.

pianowizard · #13 Post by **pianowizard** » Tue Sep 11, 2007 7:15 am

raket wrote:My old T21 Charger Does NOT fit in my X41.

Doesn't make sense. My T21's charger fits into my X41 tablet.

#14 Post by **rkawakami** » Tue Sep 11, 2007 1:12 pm

It might if the charger is not a genuine IBM adapter. An aftermarket one could have a slightly different diameter plug, even though the DC input jacks should be the same. As far as I know, none of the "56 watt" IBM adapters have 3.5A ratings. All of the ones I have seen list the current as 3.36A, which is why I sometimes call them 54 watts (16V * 3.36A = 53.76W).

T42 Charger Question

T42 Charger Question

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