using 45w power adapter on the new MBP

[ExcelonGT]

I had an extra 45w power adapter in my office; which I used to use with my Macbook Air. So today, I mated it to my new i7 MBP15 and was expecting it not to work because of insufficient power. But it seems to work just fine.

Is there any harm in using the 45w power adapter at work and the 85w adapter on the road\home? I'm assuming the 45w adapter just wont charge the battery as fast.

 

[spinnerlys]

No harm, it will just charge slower.

MRoogle is quite a good tool to search these fora and it would have brought up dozens of threads asking the same question.

 

[andrew086]

No harm, it will just charge slower.

MRoogle is quite a good tool to search these fora and it would have brought up dozens of threads asking the same question.

hmm... how come when I plugged in a 60 watt charger into mine it just said "not charging?"

 

[spinnerlys]

hmm... how come when I plugged in a 60 watt charger into mine it just said "not charging?"

I don't know, but I have used 60W adapters with my MBP in the past, and I even used a 60W today with my MBP (that originally has a 85W adapter). Maybe yours is broken somehow?
Have you checked if it charges nonetheless?