10,000 mAh vs 20,000 mAh power bank: which one should you choose?

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10.000 mAh vs 20.000 mAh powerbank: welke moet je kiezen?

A 10,000 mAh power bank or a 20,000 mAh one? On paper, the difference seems simple: one has twice the capacity of the other. In practice, however, that doesn't necessarily tell you which capacity is the best choice for you.

Because in addition to capacity, size, weight, and how you use a power bank also play an important role.

In this comparison, we set 10,000 and 20,000 mAh side by side and look at the situations in which the difference really becomes noticeable. This will help you determine which capacity best suits your usage.

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10,000 mAh vs 20,000 mAh in short

10.000 mAh
Portability Compact and lightweight
Best for Daily use and short trips
Devices Mainly a smartphone and small devices
Practical when… Size and weight matter
20.000 mAh
Portability Larger and heavier
Best for Long days and multiple days without power
Devices More practical for multiple devices
Practical when… Extra battery reserve matters more
MOJOGEAR EVO XL 20.000 mAh powerbank 22.5W - Powerbanks

What is the difference between 10,000 and 20,000 mAh?

mAh stands for milliampere-hour and indicates the capacity of a battery. In principle, a 20,000 mAh power bank can store about twice as much energy as a comparable 10,000 mAh power bank.

In practice, you can never use the full stated capacity. A portion of energy is always lost during the conversion and transfer process.

However, that does not change the ratio between the two power banks much: with 20,000 mAh, you have roughly twice as much energy reserve as with 10,000 mAh.

Would you like to know more about how capacity works exactly? Then read what capacity means for a power bank.

MOJOGEAR MINI GO 10.000 mAh powerbank met ingebouwde kabels - Zwart - Powerbanks

When is a 10,000 mAh power bank enough?

For most situations where you return to a power outlet the same day, 10,000 mAh is a practical choice.

Consider, for example:

  • a long day at work or school;
  • a day at an amusement park;
  • a festival;
  • a city trip;
  • a train journey;
  • taking photos or filming during a day trip;
  • navigating during a long walk;
  • charging your smartphone on the go during your vacation.

The main advantage is its size. You can more easily carry a 10,000 mAh power bank in your bag as a standard item, and some models even fit in a pocket or jacket.

As a result, you carry less unused capacity with you.

A good example is the MOJOGEAR MINI GO 10,000 mAh. It weighs 171 grams and has built-in USB-C and Lightning cables.

Also check out all 10,000 mAh power banks.

MOJOGEAR XL ALL-IN-1 Powerbank 20.000 mAh met ingebouwde Lightning en USB-C kabels - Powerbanks

When is it better to choose 20,000 mAh?

A 20,000 mAh power bank becomes more interesting as soon as you are unable to charge for longer periods.

For example, when you:

  • are going camping for several days;
  • are going to a festival for the weekend;
  • are on the road for long days;
  • want to charge multiple smartphones;
  • use a tablet, action cam, or other devices alongside your phone;
  • don't want to charge your power bank every evening;
  • regularly share your power bank with someone else.

In these situations, the extra capacity often outweighs the larger size.

20,000 mAh can also be useful for content creators. During a long day of shooting, your phone uses extra power due to filming, high screen brightness, mobile data, and navigation, for example. If you also use accessories that can be charged via USB, total power consumption increases further.

A MOJOGEAR EVO XL 20,000 mAh, for example, weighs 334 grams. This gives you significantly more capacity, but you are also carrying almost twice the weight compared to the 171-gram MINI GO.

View all 20,000 mAh power banks
MOJOGEAR Wireless MagSafe powerbank 10.000 mAh - Wit - Powerbanks

How many times can you charge your phone with 10,000 or 20,000 mAh?

There is no fixed number for this.

How many times you can charge depends on, among other things:

  • your phone's battery capacity;
  • the energy loss during charging;
  • how efficiently the power bank works;
  • whether you are using your phone while charging;
  • whether you are charging wired or wirelessly.

A smartphone with a large battery naturally uses more energy for a full charge than a smaller smartphone.

What you can keep in mind is:

All other things being equal, a 20,000 mAh power bank gives you about twice as much charging capacity as a 10,000 mAh model.

Would you like to specifically calculate how much capacity you need for an iPhone? Then take a look at our separate explanation on how much mAh your power bank needs for an iPhone.

MOJOGEAR EVO XL 20.000 mAh powerbank 22.5W - Powerbanks

Isn't 20,000 mAh always better, then?

No, not always.

If you only look at capacity, yes: 20,000 mAh gives you more backup.

But a power bank is meant to be carried around. Weight and size are therefore at least as important.

Suppose you only need a little extra battery every day to make it to the end of the day with your phone. Then a large amount of capacity you rarely use is of little value, while you are carrying a heavier power bank with you every day.

In such a case, 10,000 mAh is usually more practical.

On the other hand, are you going camping for three days without a reliable power outlet? Then the smaller size of a 10,000 mAh power bank becomes a lot less important than the extra capacity of 20,000 mAh.

The best choice is therefore not the largest power bank, but the smallest capacity that allows you to get through your usage situation comfortably.

MOJOGEAR EVO XL 20.000 mAh powerbank 22.5W - Powerbanks

Does a 20,000 mAh power bank also charge faster?

Not automatically.

This is a common point of confusion regarding power banks.

mAh determines how much energy a power bank can store. Watts primarily determine how quickly that energy can be delivered to your device.

Therefore, a 10,000 mAh power bank with a high charging capacity can charge your phone faster than a 20,000 mAh power bank with a lower charging capacity.

Comparing two power banks? In addition to capacity, look at the maximum output power and the charging technologies your device supports.

Do you want to take all features into account when making your choice? Then read our comprehensive guide on how to choose the right power bank.

MOJOGEAR Wireless MagSafe powerbank 10.000 mAh - Zwart - Powerbanks

One 20,000 mAh power bank or two 10,000 mAh ones?

In terms of total stated capacity, both cases come out to 20,000 mAh, but there is a difference in usage.

  • One 20,000 mAh power bank is particularly useful if you want as much capacity as possible in a single device. You only need to charge one power bank and you only have one device in your bag.
  • Two 10,000 mAh power banks provide more flexibility. You can leave one at home if you don't need that much capacity, give one to someone else, or use one while the other is being charged.

On the other hand, two separate power banks are usually less practical if you consistently need all 20,000 mAh.

Therefore, don't just choose based on the total capacity, but primarily on how you actually intend to use the power bank.

Which capacity suits your situation?

Daily use

Recommendation: 10,000 mAh

A practical backup without carrying more weight than you need.

Day trip

Recommendation: 10,000 mAh

A convenient choice for navigation, photos, videos and social media throughout the day.

One-day festival

Recommendation: 10,000 mAh

Enough backup power for the day while keeping your power bank compact.

Several days without power

Recommendation: 20,000 mAh

Extra capacity is useful when you cannot recharge your devices every evening.

Holiday with daily access to power

Recommendation: Usually 10,000 mAh

If you can recharge at night, you usually do not need to carry 20,000 mAh during the day.

Multiple devices

Recommendation: Usually 20,000 mAh

Useful when sharing your available capacity between a smartphone, earbuds, action camera or other devices.

Can I take a 10,000 or 20,000 mAh power bank on the plane?

Are you going to fly? Then, besides capacity, regulations for lithium batteries and carry-on luggage also play a role.

We have deliberately not gone into detail about this here, as the rules can vary depending on the situation and the airline.

Before you depart, check our up-to-date guide on taking power banks on a plane.

Conclusion

Are you hesitating between a 10,000 and 20,000 mAh power bank? Then primarily consider how long you will be without a power outlet.

Choose 10,000 mAh if:

  • you mainly carry the power bank with you daily;
  • a light weight is important;
  • you are primarily charging one smartphone;
  • you usually return to a power outlet the same day.

Choose 20,000 mAh if:

  • you can be without a power outlet for several days;
  • you use multiple devices;
  • you share your power bank with others;
  • extra capacity is more important than size and weight.

For many people, 10,000 mAh is therefore the most practical choice for daily use. If you structurally need more power, 20,000 mAh gives you about twice as much reserve.

Compare? View all MOJOGEAR power banks

Frequently asked questions

Is 10,000 mAh enough for a power bank?

For daily use and short trips, 10,000 mAh is usually a practical capacity. If you're without a power outlet for several days or charging multiple devices, 20,000 mAh may be a better fit.

Which is better: 10,000 mAh or 20,000 mAh?

Neither is inherently better. A 10,000 mAh power bank is more compact and lighter, while 20,000 mAh offers about twice the capacity. Which one is better depends on how you use it.

How much longer does a 20,000 mAh power bank last?

For comparable power banks, 20,000 mAh has approximately twice the capacity of 10,000 mAh. How many extra charges that provides depends on the device you are charging and the energy loss during charging.

Is a 20,000 mAh power bank much heavier?

Usually, yes. A larger battery requires more battery cells. As a result, 20,000 mAh power banks are generally larger and heavier than comparable 10,000 mAh models.

Does 20,000 mAh charge faster than 10,000 mAh?

Not necessarily. The number of mAh indicates the capacity of the power bank, not directly the charging speed. For the charging speed, you should primarily look at the power in watts and the supported fast-charging technologies.

Is it better for me to buy two 10,000 mAh power banks or one 20,000 mAh power bank?

One 20,000 mAh power bank is easier if you consistently need a lot of capacity. Two 10,000 mAh models are more flexible because you can also just take one power bank when you need less capacity.

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