Will an older 85w magsafe work with a 13" MBP

[kmarketing]

Hi,

I have an older 85w magsafe charger/adapter that I used as a spare with my older 2007 MBP that I no longer have. Can I use that charger with a 2009 Unibody 13" MBP that came with a 60w charger?

I just want to make sure I don't do any damage to the battery or the MBP.

Thanks!

 

[Intell]

It will work fine and not damage the Macbook in any way.

 

[WardC]

But you can't use a 60W charger with a MacBook Pro that requires an 85W charger. It won't work this way around.

 

[Intell]

But you can't use a 60W charger with a MacBook Pro that requires an 85W charger. It won't work this way around.

It'll work, the Macbook may not run at full speed or charge it's battery without sleeping.

 

[WardC]

It'll work, the Macbook may not run at full speed or charge it's battery without sleeping.

I accidentally bought the wrong charger for my 2.4GHz Santa Rosa MacBook Pro (my older charger had frayed), and the charger that they sent me wouldn't work, the indicator light (the green light on the charger) was a very very dim faint light and it wasn't charging, it would not boot if I took the battery out and tried to power the unit from the charger.

 

[PhelpsiPhan]

I wouldnt recommend using the wrong charger, as this can cause long term battery problems

 

[AlphaDogg]

I wouldnt recommend using the wrong charger, as this can cause long term battery problems

WRONG-O... The MBP will only draw the current it needs. If there is a 25w excess, then there is a 25w excess... No big deal.

 

[WardC]

Yeah, but if you are using too LOW a voltage charger with a MacBook Pro that requires the HIGHER 85w charger, it won't work right, that's what I was saying.

 

[AlphaDogg]

Yeah, but if you are using too LOW a voltage charger with a MacBook Pro that requires the HIGHER 85w charger, it won't work right, that's what I was saying.

Yes, that is true... But, I was not quoting you...

 

[johnnymg]

I use several different power level chargers on both my 13" MBP and 15" MBP and have never seen any difference in operation.

YMMV
JohnG

 

[jlc1978]

Yeah, but if you are using too LOW a voltage charger with a MacBook Pro that requires the HIGHER 85w charger, it won't work right, that's what I was saying.

But the 65w charger is still a 16.5 V charger (which is the low end of teh 85W spec)- just lower amperage. It'll work just fine with MBP; I use one on a regular basis.

Depending on the current draw it may take a bit longer to charge than an 85W.

Would I buy one instead of an 85? No, but I had a spare from my MB so I use it at home.

 

[Macmel]

Yeah, but if you are using too LOW a voltage charger with a MacBook Pro that requires the HIGHER 85w charger, it won't work right, that's what I was saying.

It does work. I have tested that myself. The problem is that it hardly provides energy for the MBP to keep working, so It won't charge the battery if you are working with it at the same time, but you can put it to sleep and it will.