Battery charging time

Do you want to know how long it takes to charge the battery of your smartphone, tablet or any other battery?

With our online calculator for charging time of a battery podrás saber el tiempo aproximado que se tardará en completar un ciclo completo de carga en base a su capacidad en mAh y la intensidad de carga que proporcione el cargador (valor que encontrarás grabado en su carcasa, normalmente precedido de la palabra 'Output').

How does the battery charging time calculator work?

Calculate the charging time of a battery

It simply takes into account the battery charging capacity and speed at which we are going to charge it, a factor that depends on the charging intensity provided by the charger to which you have connected the battery.

Thereafter, if the conditions are ideal and the charger is capable of providing a continuous, lossless output current, the load efficiency will be close to 100%.

If while you are charging your smartphone or tablet you are using it, you will be decreasing the efficiency of the charging process and obviously, It will take you longer to reach 100%.

How to charge a mobile or tablet battery faster?

There are a number of tips to charge your cell phone or tablet battery fasterBelow you will find them so that you can put them into practice:

  1. Put your tablet or cell phone in airplane mode.
  2. If you use a cover, remove it during the charging process.
  3. Use a charger with a higher charging current, preferably 1.5 A or 2 Amps.
  4. During the charging process, do not use the device.

Charging time of an iPhone 7

Let's see How long does it take to charge the iPhone 7? if we charge it in the computer or with its official charger.

The iPhone 7 battery has a capacity of 1,969 mAh. while the iPhone 7 Plus has a 2,900 mAh one. Let's see then the charging times:

  • USB to computer (500 mA)3.94 hours for iPhone 7 and 5.80 hours for iPhone 7 Plus
  • Official charger (1000 mA)1.97 hours for iPhone 7 and 2.90 hours for iPhone 7 Plus

These are not excessive times although it is clear that by using the charger we reduce them by half. We could also using the iPad charger to reduce them even further as they give more output current although the iPhone will limit it to 1.5A as this is the maximum they accept at the moment.

Will the iPhone 8 have a fast charging system?

Charging time of a Power Bank

There are many different types of external batteries or Power Bank (buy one, they're very cheap and can get you out of a jam) and there are models with very different capabilities. So, take a look at the loading times depending on the capacity you have.

Capacity (mAh)Charging time (using a 1.5A charger)
100040 minutes
20001 hour and 20 minutes
50003 hours and 20 minutes
80005 hours and 20 minutes
100006 hours and 40 minutes
120008 hours
1500010 hours
1700011 hours and 20 minutes
2000013 hours and 20 minutes
2200014 hours and 40 minutes

As you can see, the charging times of a Power Bank can be very high if we choose models with higher capacity. For everyday use, it is recommended that you buy one of 2000 mAh to 5000 mAh as this will allow you to fully charge your phone between one and three times.

Unless you make very long trips where electricity is not available, avoid higher capacity models as, in addition to being large, they weigh considerably.

If you are interested in When buying a Power Bank, pay attention to the following features as:

  • It should have multiple USB output ports, which will allow you to charge several gadgets at the same time.
  • The mA output provided by its USB ports depends on the charging speed of the device you connect.
  • Extra features such as flashlight function, charging status indicators and other extras are welcome.

How does the fast charging system of a cell phone or tablet work?

The latest cell phone models come with a fast battery charging system How does it work?

We have already seen that the charging time of a battery depends exclusively on the load intensity provided by the charger (the mA). A fast charging system basically accepts a higher current than the usual 1.5A of USB chargers when the battery is deeply discharged.

As the terminator is charged, the speed is self-regulating and returns to normal, hence manufacturers such as Samsung offer fast charging systems up to a specific percentage such as the 70%.

That's right, fast charging a battery is not the right thing to do. The slower you charge a battery, the longer you will prolong its life, so do not use the fast charging system every night if you are going to go to bed and you do not care if your phone or tablet is charged in a couple of hours or in 45 minutes. That will make your battery age much better, retaining more capacity when you already have hundreds of charge cycles done.

Why does the Samsung Galaxy Note 7 explode?

Samsung Galaxy Note 7 on fire

As we have just indicated, the slower a battery charges, the better.

The Samsung Galaxy Note 7 is (or was) a handset with a very large battery that has tried to be charged too quicklyThis has caused it to become unstable during the unstable process, causing the terminal to deflagrate or, in other words, to overheat, causing burns followed by an intense amount of toxic smoke which, if breathed, can be very harmful to health.

Galaxy Note 7 explosions could have happened during the charging process or spontaneouslyOnce the battery has become unstable, it progressively increases in size (swells) until it reaches a point where it can no longer withstand this state and deflagrates.

As a result, Samsung has had to immediately stop selling the Galaxy Note 7 around the world, causing losses in the millions for the company and undermining user confidence.

It is no joke if I tell you that las baterías son "pequeñas bombas" that require care, so you should always go for quality and original products because cheap can be very expensive. If you take care of your battery and charge it properly, you will avoid experiences like those of the Note 7. If you have an old cell phone at home whose battery is swollen, take it for recycling immediately or handle it very carefully to avoid scares and burns caused by your battery.

6 thoughts on “Tiempo de carga de batería”

  1. Best regards,

    Thank you very much for the calculator, it is very useful. But I have a question: if I want to charge not one 650mAh battery in a charger that works at 70mA, but two of that amperage and in that charger, what values do I put in the calculator? 650+650? Does the time double? I thank you for any information.

    • Hi Edwin. The first thing to know is if the charger provides 70mA for each channel (to each battery) or if it distributes it among the connected batteries. If it is distributed, it would be necessary to make the account that you comment although you must know that those batteries, if they already have enough use, will have lost charge and will have less amount of mAh. Greetings!

  2. I have made the calculation of the charging time of the iphone 7 battery from 1969 mAh to 1.5Ah (clearly I have passed it to the unit that touches sinedo 1500mAh) and the result is 1.31hora and you put that are 40 min. did I skip something? Thinking that this 1.31 are hours is 1hour 31min as in the operation of the example with the charger gave 1.97 hours passed to minutes would be 2 hours 37 min. am I wrong? and in that case answer me please. thank you

    • Hello Jose,

      I think you are wrong as the 40 minutes of battery charge corresponds to a capacity of 1000mAh.

      If the battery has 1969mAh (almost 2000), then the time will be twice as long, i.e. 80 minutes, which is the result given by the calculator.

  3. Hola, no afectaría el voltaje? No sería lo mismo 5v, 12v, 18v o 24v?
    Carga a la misma velocidad 5v con 10A que 25v con 2A?

    • Hello Juan,

      Los cargadores de carga rápida que existen en la actualidad juegan con el voltaje para incrementar las intensidades y acelerar la carga del dispositivo que conectamos. Tomando como ejemplo el cargador de 140W de Apple, podemos ver estos modos de funcionamiento: 5V3A, 9V3A, 15V5A y 20.5V5A y 28V5A.

      Puedes ver que hay varios modos que funcionan a 5A en los que sólo cambia el voltaje. Esto se debe a que también tenemos que cumplir la ley de Ohm y al dispositivo que conectemos el cargador no podemos meterle cualquier voltaje de entrada, tenemos que adaptarlo a sus características para no fundirlo. Con este cargador, podremos cargar el iPhone, un iPad o un MacBook y el cargador adaptará automáticamente el voltaje de salida en función del dispositivo que conectemos.

      Con respecto a tu ejemplo, a igualdad de dispositivo, cargaremos mucho antes usando el modo de 10A porque la resistencia que ofrece el dispositivo es de 0,5 Ohm mientras que en el segundo caso la resistencia es de 12,5 Ohm por lo que tendremos muchas pérdidas por calor, etc.

      Imagínate una tubería de casa. Va a tener mucho más caudal una de 10cm de ancho que una de 2cm de ancho.


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