Can i use mbp charger for mba

He used my Air's charger for his inch MacBook Pro, and it burned up his battery. When he called in a tech said it was a result of using the less powerful charger.

There is little risk of physical harm occurring if you use her adapter on your computer. You will likely just get a slower charge since there is less voltage going across the line.

There is always greater risk of using a higher powered adapter, though. I'm just throwing those in as an addition to the amperage and voltage specs that you reported. Bogdansrc is not reporting problems doing this, but I would air on the side of caution in this case. The last thing that you want to do is replace a fried logic board when you could've avoided it.

I have, in the past, fried an external HDD by using a 1. However, this system only runs the computer and will not charge the computer's battery, and Apple indicates that users should not plug this device into a car's cigarette lighter outlet. Sign up to join this community.

The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. What would happen if I use a power supply with a different wattage than the system is designed for?

Ask Question. Asked 8 years, 11 months ago. Active 3 years, 6 months ago. Viewed k times. Could damage result from under-powering my MacBook Pro? Could damage result from over-powering her Air? Will the Macbook Air charge faster with a Pro adapter? Improve this question.

Quentin 3 3 gold badges 5 5 silver badges 15 15 bronze badges. Christopher Jon Mankowski Christopher Jon Mankowski 4, 13 13 gold badges 54 54 silver badges 89 89 bronze badges. I've used her charger a lot and she used mine, no issues so far 4 months in and battery charge capacity is the same.

My MacBook Pro takes longer to charge with her charger, though. Add a comment. Active Oldest Votes. Here is the information , straight from Apple:. Improve this answer. Justsomeguy Justsomeguy 1, 7 7 silver badges 4 4 bronze badges. I have used a lower wattage charger such as 45W to power my MacBook Pro. The adapter overheated and actually burned out. I brought it to Apple and they denied the problem. I said I saw an Apple page saying there won't be any issue, but they insisted I should use the exact wattage.

When I use a lot of power on my MacBook Air default 45W charger , wire gets hot and after years insulation on the wire cracked, I can only assume this is worse if you power a larger mac with smaller wattage charger. You have 2 scenarios as I see it: 1 Using a higher rated power supply than the original unit. There are 2 points to note here: Although it isn't stated in obvious terms, the 45 W or whatever rating shown on the power supply isn't necessarily accurate, it is in fact the guaranteed minimum continuos rate that it can supply.

Pang 5 5 silver badges 8 8 bronze badges. Well written. Worry about the voltage part guys, rest things can be fine. In layman terms, voltage is force and ampere is volume. Higher volume is okay, you'll just take what you want. But higher force can blow you away. The MagSafe charger changes its output voltage to match the attached computer's needs.

Elliot i think you may have misinterpreted that article, it states that there is very little communication between the charger block and the connector so i dont see how it could modify its voltage on demand — diachedelic. Relevant quote: "charger switches to full voltage By my understanding of the USB PD Power Delivery spec, you don't actually have to worry about the voltage difference when going from a bigger charger to a smaller device.

The charger switches voltage based on the wattage pulled by the device. The MBA only draws enough power for the 20 volt charger to switch up to the 15 volt range. Gory details for the EE inclined: digikey.

Show 1 more comment. Maega Maega 31 1 1 bronze badge. So is it safe? I'd say yes. Is it good? Not if you run it at max power. Sherzod Sherzod 3 3 bronze badges.

Pratap Pratap 39 1 1 bronze badge. Taylor Fatherree Taylor Fatherree 1. Sounds like the tech make up an excuse to not RMA a faulty battery : — Navin. What would this mean for the Thunderbolt Display? It has a MagSafe connector and appears to be intended for all Mac types Good question.

I'm not sure. My best advice would be to treat it like finding wild mushrooms: unless you're absolutely, totally certain, about what you're doing, leave it alone. Like I said, I've been adventurous before, and later wished that I hadn't been.

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