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So the latter will be throttled to maintain the power balance. The 60W supply, even if connected to a 17 inch MBP, will satisfy all internal and external loads (USB, FW, drives, screen), except for the CPU and GPU.
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The CPU load shedding will, by design, always manage to balance the power. If there isn't enough power for the machine, the load shedding kicks in and throttles the CPU (and perhaps GPU - I don't recall offhand). Conversely, a fully charged battery will demand a zero charger load, and that's fine. If there isn't enough power left for the charger, the battery is by definition discharging unless it has no charge left. Thus, given an available input power, the machine load is satisfied first, and any leftover power is provided to the battery charger. The power management system also knows the electronic nameplate of the power supply and thus its rated power. The loads are prioritized: the machine has priority over the battery charger. The power management must maintain the following inequality balanced, in terms of power: (power adapter + battery as a power source) >= (battery charger + the machine). The battery as a power source is exclusive of the battery charger: a battery may operate as a power source, or the battery charger may operate, but never both at once.
#APPLE MACBOOK PRO MAGSAFE 2 CHARGER 60W FULL#
It will clearly run at full capacity for longer than a higher wattage adapter or even fail to keep up with the energy demands of a machine using more than 60w giving you a flat battery if you run a deficit of energy “while charging”. So no, a 60W adapter won't overheat when connected to a machine that needs an 85W adapter. This is a given for the systems to receive safety certifications. I will give some facts along with my reasoning.Īll MagSafe adapters, when plugged into a mechanically matching receptacle on a MacBook/MacBook Pro, are designed to run safely. These are either an L or T shaped end they used 2 types of ends on this model they are the same connections and not to be confused with the magsafe 2 T shaped end.There is a lot of misinformation in some answers. You will also need to pay to return the item.
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If it does not fit and you buy the wrong one there will be a £5 restocking fee for returning. Please check the picture as well if you are unsure. One easy way to know is if you have a CD drive in your machine this will fit if you do not it will not fit. If you are unsure please contact us and we are happy to help you establish which charger you need. This is for a Magsafe Also known as the Magsafe 1 this sale is not a Magsafe 2 it fits pre 2012 models. These are all 100% Original Apple chargers This is the Original MagSafe connection for 13″ and 11″ models before 2012. This sale is for a Genuine Used, Good condition Apple 60W Magsafe Charger.