Almost all of us use our iPhone all day long, and before going to bed we charge for the night.

Since Apple carefully conceals technical information about batteries, we deal with the situation on the basis of expert comments and personal experience.

How the iPhone reacts to prolonged charging The opinion about the harm of prolonged charging of smartphones remains popular, although Apple and other manufacturers have long ago supplied batteries with special controllers that cover the flow of energy at 100%.

A specialist of the company Anker, which deals with chargers, Edo Campos is convinced of his fallacy.

However, even in the passive mode and with the screen off, mobile devices still discharge the battery. This is due to the need to maintain the signal of the cellular network, other wireless protocols and software processes that run in the background.

It turns out, the device is discharged to 99% and again opens the way to the flow of energy to replenish the battery to 100%. The load on the power supply is minimal, so in the morning it is quite cold - and it seems that it has long ceased to work.

The lifespan of lithium-ion batteries, which are used in the iPhone, depends on the number of recharge cycles. This technical information is in the clear, so most applications for the diagnosis of batteries take it for an approximate assessment of their condition.

But Yahoo experts insist that because of the features of lithium-ion technology, iPhone batteries should be kept within 40-80% of the charge. And a permanent 100% state has a negative impact on their life.

And the founder of the company for the production of chargers Farbe Technik Shane Brouski insists that in addition to long-term connection to the power supply unit inevitably heats up. This also has a negative effect on the battery life.

Therefore, when you need to charge iPhone at night, you need to provide the device with the most favorable conditions for heat emission.

To do this, remove any protective covers from the device and leave it on a hard surface - hide it under a pillow or cover it with something you can not in any way.

How to increase the battery life of the iPhone Most of us use their iPhone without stopping. The fact is that Apple's smartphones are so firmly established in our lives that even half an hour-an hour without them seems a real torture.

We regularly receive an endless information flow through a smartphone, communicate in social networks and instant messengers, use navigation, listen to music, work with documents and even play. Turning off only in an emergency is an error.

Experts Apple Genius strongly recommend at least once a week to turn off the iPhone at night or at another time, when you can still do without it. They insist that this procedure will not affect the life of the mobile device battery as well as possible.

Lithium-ion batteries best feel when their charge is within 40-80%.

Therefore, it is not necessary to regularly discharge it to zero in no case - it was necessary to conduct such a procedure with old mobile phones and other devices that were equipped with accumulators of the previous generation.

But the constant recharging of the battery to 100% (just in case) adversely affects the period of its effective use. It is better to try a little to recharge the device after half-discharge with an external battery, than to feed it from the network to the limit after minimal use.

When charging iPhone, you can use it. But this will greatly increase the battery charging time. It is better to recharge it to 80%, disconnect and use up to 40%. And then repeat this procedure again.

Specialist company Ossia, which specializes in wireless charging technologies, Hatem Zeine notes that electricity enters the battery in a modulated form.

With the increase in the power of the power supply used for charging, the speed of lithium ion movement from pole to pole increases, so filling the battery is faster. This process has a negative effect on battery life.

Therefore, you can use the iPad power supplies only at your own risk to charge the iPhone. The device will fail because of twice the power is unlikely, but the battery replacement will be faster.

Bridging the line, Brouski insists that the main thing in charging batteries is the use of high-quality power supplies. He notes that it's better to use Apple's proprietary solutions or time-tested tools from Belkin, Griffin and other well-known brands.

When you need to change the iPhone battery to a new one Check the iPhone battery's wear without the technical difficulties that can be done only after disassembling the device on professional equipment in the service centers, it is impossible.

Therefore, experts take averaged over the cycles of recharging, which Apple on the devices of its production leaves in the clear.

After 500 full recharging cycles, iPhone batteries require replacement.

Of course, after these values ??you can use the device further. But at the same time their capacity usually drops below 80% and the battery life is significantly reduced.

However, there may be exceptions to this rule. The battery can behave quite normally after 1500 cycles, and sometimes "dies" after 40. But in the latter case, this is most likely due to moisture ingress or voltage drops, which the built-in protection could not handle.

Checking the number of charge-discharge cycles for the iPhone is easiest with the coconutBattery application, which is available for free on the Mac. In this case, you need the last tab of the program.

You can also evaluate the iPhone battery with a frost test. If the iPhone shuts down after 10-15 minutes, spent in negative temperature, its battery definitely needs to be changed. Normal "live" battery should behave in normal mode.

However, to abuse mobile devices in the cold is not worth it, because there is nothing useful in such stressful situations.

If the iPhone's battery is about to be changed, it's better to conduct this procedure at Apple's authorized service centers. Here the old will be replaced by a new original solution. Otherwise, we get an alternative of unknown origin. This is fraught with a short working time and even dangerous for life.

Summing up: leaving the iPhone on charge at night Practice shows that most of us change the iPhone at least once every couple of years. Some people prefer to buy all numbered models, while others prefer to buy s-versions of Apple smartphones.

Even with the most intensive operation, which will include a regular nightly charging of the iPhone with a power supply unit from the iPad, during this time the battery will still retain its properties at an acceptable level.

Nevertheless, if there is a desire to give iPhone to someone from family members after buying a new one, successfully sell it in the secondary market or leave it as an additional mobile device, it is better to follow simple rules:.

Do not leave the iPhone on charge all night.

-Do not charge the iPhone with the power adapter from iPad.

-hold the charge of the device at a level of 40-80%.

-if you leave the smartphone on charge for the night, provide it with normal heat dissipation.

- hold iPhone with Apple's branded power supply units or brand analogs Belkin or Griffin.

-Time change old batteries to new ones in official Apple services - better right after 500 recharge cycles.

From myself I want to add that it is possible and not to fool the head by observing possible rules, and to enjoy the iPhone with pleasure. The cost of replacing the battery is not worth the trouble.