Will 20W Charger Charge Macbook Pro Effectively

Hanna1 week ago

1 6 minutes read

A 20W charger isn’t the ideal choice for charging a MacBook Pro, but it can provide some power in a pinch. Keep in mind, it will charge very slowly and may not meet your MacBook Pro’s energy needs, especially during intensive tasks. For optimal performance and quicker charging, a higher wattage charger is recommended.

In short, a 20W charger can technically charge a MacBook Pro, but it’s not practical for regular use. It will take a long time to charge and might not keep your laptop powered during demanding activities. To ensure your MacBook Pro charges efficiently and safely, selecting a charger with higher wattage is the best route.

Starting with a 20W charger for a MacBook Pro may seem convenient, especially if you only need a quick boost or are in a pinch, but it’s far from the optimal solution for everyday use. MacBook Pros are designed to charge with higher wattage chargers—typically 61W or 87W—depending on the model. Using a 20W charger can work in emergencies, but don’t expect it to significantly power your device or work effectively over extended periods. If you want your MacBook Pro to charge efficiently and maintain its performance, investing in a compatible, higher wattage charger is essential.

Will 20W Charger Charge MacBook Pro? Everything You Need to Know

Understanding Charger Power and Charging Speeds

Charging your MacBook Pro depends greatly on the power output of your charger. A 20W charger is considered low wattage for many Apple laptops. Typically, MacBook Pros require more power to charge effectively and quickly. This means that using a 20W charger might not provide optimal charging performance.

What is Wattage and Why Does It Matter?

Wattage indicates how much power a charger can deliver to your device. A higher wattage means faster charging, especially for larger devices. MacBook Pros usually need chargers with 30W, 61W, or even 96W power outputs for efficient charging. Therefore, a 20W charger offers significantly less power and may affect charging speed.

Will a 20W Charger Charge a MacBook Pro at All?

In most cases, a 20W charger can charge a MacBook Pro, but very slowly. It may not provide enough power to keep the battery level steady when the device is in use. If your MacBook Pro is turned off or in sleep mode, the charger might slowly add charge over time.

Compatibility of 20W Chargers with MacBook Pro Models

Different MacBook Pro models have varied power requirements. For instance, older models like the 13-inch MacBook Pro may have a lower charging requirement. Newer or larger models, like the 16-inch MacBook Pro, demand much higher wattage.

Older MacBook Pros (Up to 2017)

Many of these models came with 60W or 61W chargers. A 20W charger could partially charge these laptops but would be very slow and might not keep the battery level stable during use.

Recent MacBook Pros (2018 and Later)

Modern MacBook Pros often require 67W, 96W, or higher. Using a 20W charger here is unlikely to be effective—charging will be very slow, and the device might not charge at all if it’s heavily used.

Impact of Using a 20W Charger During Usage

When your MacBook Pro is actively being used, a 20W charger might barely keep up with power consumption. This can result in the battery slowly draining even while connected to power. For light tasks or in standby mode, it may provide some charge but not enough for efficient use.

Charging Time Estimation with a 20W Charger

Charging from 0% to 100% with a 20W charger could take several hours—potentially double the time taken with a standard higher wattage charger. Here’s a simple breakdown:

Charge from 0% to 50%: Approximately 3-4 hours
Full charge: Potentially over 8 hours or more

Such long charging times can be inconvenient for daily use.

Can a 20W Charger Be Used as a Backup?

Yes, a 20W charger can act as a backup for your MacBook Pro. If your primary charger fails, it’s better than nothing. Keep in mind, though, it’s best used when you have time to recharge your laptop slowly.

Type of Cable and Port Compatibility

Most 20W chargers use USB-C ports. Make sure your MacBook Pro has a compatible USB-C or Thunderbolt 3 port. Using a high-quality USB-C cable is essential for efficient charging and safety.

Fast Charging with Higher Wattage Chargers

Apple’s newer MacBook Pros support fast charging with compatible power adapters. For example, a 61W or 96W charger can charge your device significantly faster than a 20W charger. This is especially helpful if you need to quickly recharge your device during a busy day.

Safety Considerations with Low Wattage Chargers

Using a charger with lower wattage isn’t inherently unsafe, but it can cause your device to heat up or the battery to degrade faster over time. Always use chargers approved by Apple or reputable manufacturers to avoid potential damage.

Alternatives to a 20W Charger for MacBook Pro

If your goal is faster charging, consider investing in an Apple or certified third-party charger matching your MacBook Pro’s wattage requirement. For example:

61W USB-C Power Adapter for most recent MacBook Pros
87W or 96W chargers for larger models

Remember, always opt for chargers with proper safety certifications.

Summary of Key Points

A 20W charger can charge a MacBook Pro but very slowly.
The effectiveness depends on the MacBook model and usage status.
Faster and more efficient charging requires higher wattage chargers (30W to 96W).
Using a low wattage charger is more suitable as a backup or during emergency situations.
Ensure compatibility with USB-C ports and use certified cables for safe charging.

Frequently Asked Questions

Can a 20W charger fully power a MacBook Pro during regular use?

No, a 20W charger typically cannot fully power a MacBook Pro during regular use, especially when performing demanding tasks. It may provide some charge when the device is idle or used lightly, but it is unlikely to keep the battery fully charged or run the laptop effectively under load.

Is it safe to connect a MacBook Pro to a 20W charger?

Connecting a MacBook Pro to a 20W charger is generally safe, as the device has built-in power management features. However, the charger may not supply enough power for optimal performance or charging speeds. Always use certified chargers recommended by Apple to ensure safety and compatibility.

Will using a 20W charger affect the charging time of a MacBook Pro?

Yes, using a 20W charger will significantly increase the charging time compared to the original higher-wattage charger. The MacBook Pro may take several hours to reach full charge, especially if it is in use during charging or performing intensive tasks.

Can I use a 20W charger to charge a MacBook Pro on the go?

While you can use a 20W charger to recharge your MacBook Pro while on the move, it is not ideal for regular charging. It is best suited for emergencies or maintaining battery levels temporarily, but it will not provide fast or reliable charging for daily use.

Would a 20W charger impact the MacBook Pro’s battery health over time?

Using a 20W charger occasionally should not harm your MacBook Pro’s battery. However, consistently relying on a lower wattage charger may cause the battery to charge more slowly and potentially affect overall battery health over the long term due to extended charging times and incomplete charging cycles.

Final Thoughts

A 20W charger cannot effectively charge a MacBook Pro, especially the newer models with larger batteries. It may charge slowly or only provide a small top-up, but it won’t meet the device’s power needs for full usage.

Will 20w charger charge macbook pro? It might charge some older or very small models, but in most cases, it won’t deliver sufficient power. For optimal performance, a higher wattage charger remains essential.