An ideal scheme does not exist, but still adhere to generally accepted rules and recommendations of the manufacturer.
iPhone is an expensive device, which, as a rule, we buy for at least 2 years. At the same time, we hope that after the planned service life he will continue to work properly and we will be able to sell it for "good" money.
One of the first, buyers of used iPhones, asked about the status of the device’s power source, for example: “How much does the battery hold?”. So it makes sense to take care of the proper operation of the iPhone battery right now.
As a power source in iPhones, iPads and other portable equipment, Apple (other manufacturers too) uses lithium-ion batteries, which:
- Charging faster.
- Work longer.
- They have a high specific capacity.
- Not subject to memory effect.
The effect of the battery memory is understood as the reversible loss of capacity that occurs in some types of electric batteries in violation of the recommended charging mode, in particular, when recharging an incompletely discharged battery.
As an owner of an iPhone and iPad with experience (since 2008), I declare with all responsibility that Apple uses high-quality power sources in its products.
According to official information, the battery on the iPhone provides up to 80% of the original capacity after 500 full recharge cycles (on the Apple Watch, iPad, MacBook – after 1000 cycles). This means that after 500 full recharging cycles, the battery life of the iPhone will decrease by only 20% (ideal case).
The loss of battery capacity over time is inevitable and is caused by the natural aging process, the intensity of which is affected by:
- The temperature at which the battery is operated and charged.
- Depth of discharge before next recharging.
- Charging currents higher than regulated by the manufacturer.
So, so that the battery on your iPhone after two years of operation "keeps" a minimum of daylight, follow simple rules.
Table of Contents
How to charge an iPhone correctly?
A separate page is dedicated to this issue on the official Apple website.
1. Do not operate or charge the device in extreme temperatures (at –40 ° C and + 50 ° C).
Apple considers the temperature range from 16 to 22 ° C ideal and does not recommend "use the device at temperatures above 35 ° C, as this may irreversibly reduce the battery capacity." Overheating is critical!
From personal experience: I don’t look at the thermometer when I pick up my iPhone 5s, which I don’t advise. It is enough to:
- Direct sunlight hit the device.
- Do not leave it in a car in hot weather.
- Do not charge under the pillow.
3. To charge the iPhone, use the original charger and at least a certified USB cable.
For example, if you increase the charge voltage of a lithium-ion battery by only 4%, then it will lose twice its capacity from cycle to cycle. To prevent this, special PMIC controllers are built into the original network adapter and directly to the iPhone (in batteries this is the Battery management System), which ensures that the conditions for charging the device do not go beyond the permissible limits: temperature, current, and voltage.
In network adapters without a clan and tribe, the so-called "no names", such a controller may not be. Therefore, the voltage at the output of such an adapter may exceed acceptable values and may burn the power controller on the iPhone, and then damage the battery.
From personal experience: Charge the iPhone from the original chargers with a certified cable and forget about battery problems.
4. Do not discharge the iPhone completely (up to 0%).
The lifetime of a lithium-ion battery is usually expressed in the number of cycles of a full discharge when you consume 100% of the battery capacity. For high-quality power sources, this is 400-600 cycles. Apple claims that the battery life of the iPhone is 500 cycles, and the iPad, Apple Watch and MacBook – 1000 cycles.
Whenever you fully discharge your device, its life span is reduced. The reason for this is the depth of discharge.
It turns out that the more you discharge a lithium-ion battery, the faster it "dies." To maximize battery life, do not allow deep discharge.
For clarity, I will give the dependence of the number of battery discharge cycles on the depth of discharge.