Portable batteries: What is mAh and what does it influence when deciding which one to buy

Since the iPhone is iPhone, everyone complains that its battery barely lasts a day. Unlike the old cell phones whose charge lasted 6, 7 days, the smartphones (and their huge color screens) brought computers into our pockets, requiring a lot more of the battery. Today we watch videos, listen to music, read, write and use various applications in our day-to-day lives.

If the iPhone battery cannot handle all of this, the solution found by many is to purchase a external battery (also called power bank). There are several options, with varied prices, so much so that it is even difficult to choose. But why are there R $ 50 batteries and R $ 200 batteries? What’s the difference between them? And which one should you choose to use with your device?

In this article, we will explain how important it is for you to know what it is mAh to decide which battery to choose.

The external battery is a facility that has become almost a necessity today. More and more portable, they add extra gas to the iPhone, making it last longer without needing an outlet. But which one to choose?

First of all, you need to be careful about their quality. There are very cheap options, but they do not respect any type of safety standard, putting the user at risk. They are called “pirates” and it is not difficult to identify them, especially if they do not have a known brand. They are easily found in “street vendors” or product stores in China, for low prices.

Ideally, you avoid this type of battery without certification. In addition to being dangerous, they tend to degrade more quickly, and often do not last for many months with the same capacity. The cost / benefit ratio, in the end, ends up not paying off.

Always look for batteries certified by a known body, such as the United States’ FCC, or the “CE” mark of the European Community. This ensures that the hardware meets some minimum quality and safety requirements.



Another factor that influences the price of batteries is the capacity, which can be measured using information called mAh (milliampères hour). It is knowing this that you will be able to assess how much energy the battery is capable of holding, to later be transmitted to your device. The greater the number of mAh, the more energy it will be able to store.

Following this logic, it is easy to conclude that a battery that claims to have 2,000mAh charges an iPhone less than another that indicates 5,000 or 10,000mAh. The bigger, the more times your iPhone will be charged without the battery losing its entire reserve.

To assess whether an external battery is sufficient for your day-to-day life, it is important to know the battery capacity of your iPhone or iPad. Of course, the tablet, because it is bigger, requires more energy to be charged than the cell phone. But even iPhone batteries vary by model. The iPhone 6s, for example, is smaller than the iPhone 6 (as we explain here), which means that it recharges more quickly. See the capacity of each model in the table below:

Model Battery capacity Model Battery capacity
iPhone 4 1,420 mAh iPad 1 6,613 mAh
iPhone 4S 1,432 mAh iPad 2 6.5790 mAh
iPhone 5 1,440 mAh iPad 4 11,560 mAh
iPhone 5c 1,510 mAh iPad mini 4,440 mAh
iPhone 5s 1,560 mAh iPad mini 2/3 6,471 mAh
iPhone 6 1,810 mAh iPad mini 4 5,124 mAh
iPhone 6 Plus 2,915 mAh iPad Air 8,827 mAh
iPhone 6s 1,715 mAh iPad Air 2 7,340 mAh
iPhone 6s Plus 2,750 mAh iPad Pro 9.7 7,306 mAh
iPhone SE 1,624 mAh iPad Pro 12.9 10,307 mAh


Therefore, to charge your device just choose an external battery with more capacity than it. For example, for a full charge of an iPhone SE, a power bank 3000 mAh is enough. Already a 10,000 mAh can charge up to 5 times the device, which is ideal when traveling, when we spend a lot of time away from plugs.


It is important to take into account that during charging there is always a loss of energy, which happens in the transfer. So always look for a battery with more charge than your device can handle. The official Apple battery cover, for example, has 1,877 mAh capacity, but can only charge in 80% the iPhone 6s, which has a 1,715 mAh battery.

Apple battery cover

Now you have learned what those numbers that come with batteries mean and you are able to choose the best one for you. If you are suffering with your iPhone when you leave home and are interested in knowing some great options for portable batteries, we have some suggestions for you on this link. ?

Check out other tips articles for iPhone and iPad in our special section.