65W 20V AC Adapter gets super hot (including new adapter replaced on warranty)

I bought a e420 in March and the 65W 20V AC adapter it came with has always ran really hot. Hot enough you can't really hold it while using the laptop while it's plugged in. When the laptop is off and charging, it's very cool. Now I just recieved a new adapter through warranty and it also gets really hot.
I also ordered my e420 with the big 9-cell battery, could that effect it? I'm also worried it has been killing my battery life as well, as it's much lower now on full charge than when it was new 7 months ago. I try to take care of the battery by almost always let it run down before charging it and don't use it plugged in unless i have too.
Would appreciate any thoughts on this. i see several random posts about hot ac adapters on the forum here but found no real conclusions.
-Thanks

Hi synovo,
May i have the machine type please? If your machine equipped with descrete graphic please disconnect immediately for safety reason, and use 90W AC instead. Anyway please contact local lenovo for further info
Worldwide Support Center phone list for ThinkPad, ThinkCentre and ThinkStation systems
http://support.lenovo.com/en_US/detail.page?DocID=PD008370
Fred
T61 + X201i

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