In a world where mobility and flexibility are becoming increasingly important, many people are looking for ways to charge their laptop on the go without relying on a power outlet. A popular solution is charging the laptop with a power bank.
In this article, you will learn what to look out for, how the charging process works, and what technology you need.
Requirements: Which power bank is suitable for a laptop?
Normal power banks used for smartphones are usually not sufficient for laptops. A laptop requires significantly more energy and a higher output. Therefore, pay attention to the following features:
- High capacity: At least 20,000 mAh, better 25,000 to 30,000 mAh.
- High output: 30 to 100 watts of output are required depending on the laptop.
- Suitable ports: A USB-C port with Power Delivery (PD) is ideal. Older laptops may require a DC output.
- Voltage compatibility: The power bank should deliver the same voltage as the laptop, typically 5V, 9V, 15V, or 20V.
A power bank with these specifications ensures that your laptop can be charged safely and efficiently. The right power bank can make the difference between productive work time and a dead battery.
Requirements on the laptop side
Not every laptop can be charged via USB-C. The following requirements should be met:
- USB-C charging function: The USB-C port must support charging. This is often indicated by a lightning symbol or the designation "PD" (Power Delivery).
- Compatible charging cable: Use a high-quality USB-C cable that supports Power Delivery.
For older laptops that are charged via a proprietary power supply, you will need a power bank with a suitable DC output and the right adapter. Always check your laptop model's technical specifications before purchasing a power bank.
How does charging with a power bank work?
The principle is simple: the power bank is connected to the laptop via a cable and supplies the necessary power. The following points should be observed:
- Use a certified cable: Only a Power Delivery-compatible cable guarantees the necessary energy transfer. High-quality USB-C cables support higher currents and ensure stable charging.
- Pay attention to the correct output: If the output is too low, the laptop may consume more energy during operation than is being charged.
- Charge the power bank in time: High-performance power banks often require a charger with at least 45 watts of output to be efficiently charged themselves.
Once you connect a suitable USB-C fast charging cable, the charging process starts automatically. Modern power banks with Power Delivery recognize the connected device and adjust the optimal charging voltage and output.
Advantages and disadvantages of charging a laptop with a power bank
Advantages
- Flexibility: You can use your laptop independently of power outlets.
- Ideal for on the go: Particularly useful for travel, field appointments, and outdoor adventures.
- Multifunctionality: Many power banks can also charge smartphones, tablets, or other devices at the same time.
- Backup power supply: In the event of a power outage, the power bank can serve as a backup and save important work.
- Environmentally friendly: Some power banks can even be charged sustainably with a solar charging option.
Disadvantages
- Higher acquisition costs: High-performance power banks are significantly more expensive than models for smartphones.
- Weight and size: The more powerful the power bank, the heavier and larger it is.
- Charging losses: About 10 to 30 percent of the stored energy is lost due to conversion losses (DC-DC conversion).
- Longer charging times: Charging the laptop with a power bank can take longer than with the power adapter.
- Limited lifespan: Over time, the capacity of the power bank decreases.
Important safety features
When buying a power bank for your laptop, you should look for the following protection mechanisms:
- Overheating protection: Prevents dangerous temperature rises and protects the cells.
- Overload protection: Stops the charging process in the event of excessive current.
- Short-circuit protection: Interrupts the current flow in the event of a short circuit.
- Overvoltage protection: Protects your laptop from damage caused by excessive voltage.
- Deep discharge protection: Prevents harmful deep discharge of the power bank.
These features prevent damage to your laptop and ensure safe use. When buying a power bank, pay attention to certifications and quality seals that guarantee these safety standards.
Practical tips for use
- Plan for capacity loss: A 20,000 mAh power bank realistically delivers only about 14,000 to 18,000 mAh due to conversion losses.
- Observe regulations for air travel: Power banks must not exceed 100 Wh if you want to take them on a plane. This corresponds to about 26,800 mAh.
- Keep an eye on remaining charge: Models with a percentage display offer better control over the power bank's charge level.
- Use pass-through charging: Some power banks can charge themselves and power the laptop at the same time.
- Use the power bank regularly: Like all lithium-ion batteries, power banks should be regularly charged and discharged to maximize their lifespan.
- Pay attention to temperatures: Extreme temperatures can affect the performance and lifespan of the power bank.
Questions and answers about laptop power banks
Can you operate a laptop with a power bank?
Yes, provided the power bank has sufficient capacity and output, you can even charge your laptop while using it. Power Delivery support and a suitable cable are required.
How powerful does a power bank have to be for a laptop?
The power bank should provide an output of at least 30 watts. For powerful laptops such as gaming models, 65 to 100 watts are recommended.
Which power bank brands are recommended for laptops?
Well-known and reliable manufacturers for laptop power banks are Anker, Zendure, Omnicharge, and HyperJuice. These brands offer high-quality power banks with sufficient capacity, Power Delivery support, and the necessary safety features for safe laptop charging.
Can I charge any laptop via USB-C?
No, only laptops whose USB-C port supports Power Delivery can be charged via USB-C. Older models often require special adapters or other charging ports.
Conclusion: Charging your laptop on the go made easy
Charging a laptop with a power bank is the ideal solution for anyone who wants to work, study, be creative, or spend their leisure time digitally with flexibility and independence. To reliably charge your laptop on the go, the power bank should have a capacity of at least 20,000 mAh and an output between 30 and 100 watts. Make sure it supports USB-C Power Delivery (PD) for fast and efficient charging. A high-quality USB-C cable specifically designed for high charging capacities is equally important.
When buying a power bank, consider safety features such as overheating and overvoltage protection to safeguard your laptop and other devices. Modern laptop power banks are now compact, powerful, and ideal for mobile use – invest in quality and enjoy the freedom to charge your devices anytime and anywhere.