Does The Wattage Of A Charger Matter?

What is the difference between 45w and 65w charger?

You can definitely use the 65W charger.

The brick will be a little larger and heavier and it will charge your battery a bit faster.

The plug and the voltage are the same so it works with your laptop fine..

Can I use a 45w adapter on a 65w laptop?

Using a charger with the incorrect watt usage can shorten the battery life of the laptop when it’s not plugged in it’s good idea to keep using a 65w charger for the laptop. … If the 45W has more Amps then the 65W then it will work better.

What happens if I use a lower wattage laptop charger?

The immediate consequence of the above will be that the battery will charge slower when charged by a lower watt charger, but in some cases if the watt rating is so small that it is less that the power consumed by the laptop while operating your laptop will discharge even when plugged in.

Can a charger be too powerful?

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.

Can I use 60w charger instead of 45w?

Power adapters for Intel-based Apple notebooks are available in 45W, 60W, and 85W varieties. … You can always use an adapter that has a higher power rating than is required as long as the voltage rating is the same.

Can I use a 65w charger instead of 45w?

As long as it is the same voltage and connector type you can use a higher watt adapter. It will charge the battery a bit faster but other than and the size of the brick you will see no difference.

What happens if amps are too high?

A higher voltage than a device is designed for will most likely blow up some components, but amperage is derived from how much current is actually drawn, based on the device’s resistance, so having “too much” is not a problem and will do no harm.

Can I use a 90 watt charger on a 130 watt laptop?

Generally the answer is yes, but it won’t supply enough power to charge the battery while you’re using your laptop. This will probably invalidate your warranty and could cause damage to your laptop, but the changes for that are small.

Is higher or lower amps better?

Higher voltage is better when current has to travel long distances. A low amp and high voltage system allows you to reduce the amount of electrical current, so less of it is lost as it travels through wires, while still delivering the same amount of horsepower at the end.

Can I use a 65w charger instead of 85w?

Yes, with a caveat. The 85W adapter can be used inconsequentially with both models. It will provide ample power to both the MacBook Pro and MacBook, and will not damage the latter despite a higher-than-necessary wattage. The 60W adapter can also be used to some extent with both the MacBook Pro and MacBook.

Can I use a charger with higher wattage?

Yes, Your laptop has been designed to draw up to a certain amount of power when running at full power. … This means that you can quite safely use a charger with a higher wattage (or amps) rating as the laptop will only ever draw the amount of power required at the time.

What does the wattage on a charger mean?

Wattage, on the other hand, is the rate at which energy is either created or spent. Watts represent energy per unit of time. … A PC USB charger delivers 2.5 Watts of power (5 volts at 500 mA). An iPhone charger delivers 5 Watts (5 volts at 1000 mA). A Retina iPad mini charger delivers 10 watts (5.1 volts at 2100 mA).

Can I use a 90 watt charger on a 65 watt laptop?

Yes, you can use a 90 watt ac adapter, a.k.a power charger, for your 65 watt-compatible laptop. It will actually charge your battery faster. But, and this is a big but, you cannot use a 19 Volt ac adapter on an 18.5 Volt-laptop.

Can I use a 90 watt charger on a 120 watt laptop?

You should not use a 90 Watt brick if you need a 120 Watt brick. While I talked about charging currents, The max output requirement is based on Charging current required by a depleted battery pak + Operating current required by the laptop under full load.

Can I use a 19v charger on a 19.5 V laptop?

Voltage: 19.5V and 19V is a relatively small voltage difference. It is most probably safe to use as long as: The current of the charger is the same or higher than that of the laptop. … The output power (Amps * Volts) of the original and the new charger differs in 0.6 Watts, the 19.5V charger having more output power.

Does higher wattage mean more power?

The Wattage of the light is the amount of energy it takes to produce a certain amount of light. The higher the wattage, the brighter the light, but also the more power it uses. … 100 Watt incandescent lamp produces 1700 – 1800 lumens and uses 100 Watts of energy per hour.

Can I use a 45w charger instead of 90w?

If the output voltage is the same, you can use a 90W charger on a 45W laptop BUT cannot use a 45W charger on a 90W laptop. On the condition of same voltage, laptops and other devices will never overpowered. The amps you saw is the maximum one adapter is capable of, not the rated current.

Can I use 12v for 5v?

Current is decided by Ohms law, I=V/R. With 12V your device will draw double the current and gets heated up because all current limiting values of your device are calculated for 5V source. … Most TTL ICs which are rated for 5V have a max acceptable voltage limit at 7V. Same is true for 5V microcontrollers.

What does 5v 2a mean?

DC 5V/2A, means that the input voltage, to recharge the battery is 5 volts of direct current. 2A is the amount of amperage that is suggested to recharge the battery. This dose not mean that a transformer of lesser amperage won’t charge it it would just take longe.

Can I use 65w charger instead of 130w?

If its original charger is a 130W adapter, then no, a 65W wouldn’t work. It might work entirely by coincidence (the plugs are the same and the computer somehow can operate at a much lower wattage, but that is like jumping into a dark room and trusting on blind luck that i’s not a spiked pit at the bottom.

What is the difference between 65 Watt and 90 Watt AC adapter?

The one main difference between both of them is the current it can source while charging at the same voltage. Yes, a 90 watt charger can charge quickly when compared with a 65 watt charger. … The one main difference between both of them is the current it can source while charging at the same voltage.