Is the first charge important for the correct function of the battery in a mobile phone? The truth is that a lot of things have changed since the new LiIon batteries came out.

Since 2002 most mobile phone companies have stopped using NiMh batteries and adopted the LiIon batteries and the way of charging is not as it used to be in the past. In this has contributed both the technology of the chargers and the mobile charging systems –especially of the smartphones– which use energy saving technology. That means that no matter how many hours you let the mobile charging, when it reaches 100% the battery stops absorbing electricity from the charger and the charger respectively gives power when the phone drops to 99% in which case both charging systems will reactivate (charger-mobile charging system). In reality it is not valid what most mobile phone stores recommend as far as the first charge is concerned, that is that the phone must remain for 4-6-8-12 hours in the first time of charging!

A crucial impact on the correct charge has the charger. The more mAh the charger makes, the faster the battery charges but in most cases without reflecting the real duration of the battery and as a result the battery life drops dramatically. For example, an ipad charger that has 2000mAh in its output can charge an iphone in half of the time needed by the normal iphone charger which output has half of the mAh of the ipad. The problem that will arise in the long future is that the iphone battery will expand or it will lose its autonomy faster than if we charged the iphone with its normal charger. Except for that with the fast charger the charge doesn’t last as much as the charger with less mAh. That means that a full charge with the normal charger of an iphone, the phone will have a 36 hours autonomy whereas with the charger of the double mAh only 24 hours. The values mentioned are based on an experiment in a central lab of the 9Volto.

It is very important to know that the LiIon batteries which most mobile phones have now must not be empty to charge them but when the reach 10-20%. If you let it completely discharged, it is likely that the charger will not be able to give it the voltage needed to start the charging process and the phone to be dead by believing that the problem is in the process of technical failure. This is the case when the battery has passed a charge cycle (100-200 charges) and the battery data begins to show the first damage. The slower, the better. The slow charging is always one that gives life to our battery and more autonomy. The slow charging is achieved with chargers that emit a few mAh. But there is a problem with chargers that make a few mAh. When we have smartphones that have large capacity batteries> 1700 mAh, the chargers can’t correctly charge these batteries. This means that the larger the battery, the more difficult it can be charged by a charger with a few mAh. In such cases, it is best to use the chargers that the company takes or even -20% less mAh. That is, if the charger that the company gives us is Micro usb with 1000 mAh output we will get a better result if we charge our mobile phone with a 800mAh. The result will be shown during battery life and battery life.

Correct charging cycles. Make a full charge of the phone and not many times a day and a few loads. The life cycle of a battery is measured with what loads. Indicatively, manufacturers report that in 500 charging the battery life drops to 20% (-80% from its original range of autonomy). That is, if we charge our phone twice a day, in 250 days the battery will have reached its RIP. If we charge it once a day then it will take us 500 days and so on. Prices are based on manufacturers’ specifications and of course there are other parameters that can affect the life of the battery such as the current quality, the climate or humidity of the space being charged and so on. Overheating of the mobile phone causes wear and loss in battery capabilities. The heat of a mobile phone – especially a smartphone – is triggered by the activation of 3g or gps and, in general, of packets of data from an application that receives and sends data (browser, youtube, streaming programs, online games, etc.). Part of the battery’s energy is consumed by its heat and the constant power supply to the cell becomes unstable, so overheating can cause the phone to close. In addition, overheating along with charging can cause the battery to inflate. The battery cells are warmed up by overheating and as soon as we put the battery for charging it works like a grill.

We listed the most important parameters that make a battery work properly on a mobile phone and are not the endless hours of the first or the first charging as many mobile phone shops incorrectly inform.

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