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"Note that if you buy the new portable charger it does not charge the Thinkpad while the 'pad is turned on. Therefore, I use it at home, and my original one on the road. This way I have a battery in the unit at home, as a backup, but I am not abusing it by constantly charging it. On the road, generally I *want* to charge the battery at every chance, since there is the liklihood that I might be somewhere where I don't have ready access to a plug." We have discussed this before, what exactly is "the new portable charger", are you talking about the inexpensive AC adaptor, P/N 85G6670, because I certainly see that charging my Li-Ion batteries while the pad is turned on.