Adam Kos The battery life of a mobile phone is mainly determined by its battery capacity. Of course, it depends on the demands placed on it by the individual functions, and it also depends on the specific use of the device by the user. But it can be said that the more mAh the battery has, the longer it lasts. However, if you are planning to buy a power bank, the generally accepted notion that the mAh of the iPhone is equal to the mAh of the external battery does not apply here.
There is an abundance of different external batteries and power banks from different manufacturers on the market. After all, historically, Apple also sells those intended for iPhones. Previously, he focused on the so-called Battery Case, i.e. a cover with a "backpack" into which you put your iPhone. With the advent of MagSafe technology, the company also switched to the MagSafe Battery, which can charge compatible devices wirelessly.
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But is this battery right for your iPhone? First, take a look at the battery capacities in the latest iPhones. Although Apple does not officially list them, but according to the website GSMarena are as follows:
- iPhone 12 - 2815 mAh
- iPhone 12 mini - 2227 mAh
- iPhone 12 Pro - 2815 mAh
- iPhone 12 Pro Max - 3687 mAh
- iPhone 13 - 3240 mAh
- iPhone 13 mini - 2438 mAh
- iPhone 13 Pro - 3095 mAh
- iPhone 13 Pro Max - 4352 mAh
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Apple does not mention the capacity of its MagSafe Battery either, but it should have 2900 mAh. At a glance, we can see that it should charge the iPhone 12, 12 mini, iPhone 12 Pro and iPhone 13 mini at least once. But is that so? Of course not, because in its description Apple itself states the following:
- iPhone 12 mini charges MagSafe battery up to 70%
- iPhone 12 charges MagSafe battery up to 60%
- iPhone 12 Pro charges MagSafe battery up to 60%
- iPhone 12 Pro Max Charges MagSafe Battery Up to 40%
Why is that so?
For external batteries, it is not true that 5000 mAh will double charge a device with 2500 mAh battery and so on. To really estimate how many times you can charge your phone battery, you need to keep the conversion rate in mind. In other words, it is the percentage that is lost when the voltage changes between the external battery and the device. This depends on each manufacturer as well as the brand. Powerbanks operate at 3,7V, but most mobile phones and other devices operate at 5V. So some of the mAh is lost during this conversion.
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Of course, the condition and age of both batteries also have an effect on this, as battery capacity decreases over time, both in the phone and in the external battery. Quality batteries usually have a conversion ratio higher than 80%, so it is advisable to expect that when you charge your device from a powerbank, you will usually "lose" exactly that 20%, and therefore you should take this into account when choosing the ideal powerbank.
Adam, you can only achieve 80% (up to max. <82%) with a handful of the best ones (which really have a solid non-fake battery with a real, i.e. not just the declared capacity at 3,7V) and only with a high-quality, i.e. almost lossless cable , which you failed to mention. In the case of MagSafu = Qi, it is necessary to add its considerable losses, both in transmission and as a result of higher heating of both batteries. In reality, you will be happy with him for 65, max. 70%. Which otherwise normally applies to the mainstream of relatively high-quality wired devices.
After all, with an easy calculation you will find that the original MS "miracle" can handle, I note in the laboratory, a maximum of 67,93% in the case of 12 mini.
..hell, I mistakenly installed the iP12 capacity without an attribute, correctly it is an even poorer 53,76%!
Cupertino people know very well why they don't publish capacities ;)
Thanks for clarifying the issue. The article wanted to correct the classic cliché that the value of a power bank is not the same as the value of a phone battery. I drew from general sources, that's why I stated the 80%.
The author of the article is a bit off. The capacity in mAh does not say anything about the actual capacity. For batteries from the phone and from power banks, it is necessary to compare the capacity in Wh, as the voltage is different. E.g. 1000mAh x 3,7V = 3,7Wh
1000mAh x 5V = 5Wh
In the article, I state: "Powerbanks work with 3,7 V, but most mobile phones and other devices work with 5 V. Therefore, during this conversion, part of the mAh is lost." put the article in perspective.