Owners of various devices sometimes have certain difficulties in finding information about the proper operation of batteries. This brief FAQ is dedicated to this question.
All modern phones, smartphones and PDAs are equipped with lithium-based batteries - lithium-ion or lithium-polymer, so in the future we will talk about them. These batteries have a remarkable capacity and service life, but require very strict adherence to certain rules of operation. These rules can be dividedinto two groups
1. User Independent
2. Dependent on user.In the first group
includes the fundamental rules of charge and discharge of batteries, which are controlled by a device (controller) built into the battery, and sometimes also by an additional controller located outside the battery in the PDA itself. These rules are simple:
1- A battery should be in a state all its life in which its voltage does not exceed 4.2 volts and does not fall below 2.7 volts. These voltages are indicators of respectively the maximum (100%) and minimum (0%) charge.
2- The amount of energy given off by a battery when its charge changes from 100% to 0% is its capacity. Some manufacturers limit the maximum voltage to 4.1 volts, while the battery lives longer, but its capacity is reduced by about 10%. Also, sometimes the lower threshold rises to 3.0 volts with the same consequences.
2- The highest battery durability is achieved at approximately 45 percent charge, and with an increase or decrease in the degree of charge the battery life is reduced. That is why literate manufacturers sell batteries that are about half full. If the charge is within the limits provided by the battery controller (see above), the change in durability is not very significant, but still.
3- If, due to circumstances, the voltage on the battery exceeds the limits indicated above, even for a short time, its lifespan dramatically decreases. Such states are called overcharge and overdischarge and are very dangerous for the battery.
4- controllers of batteries intended for different devices if they (controllers) are made with appropriate quality, never allow the battery voltage during the charge to become more than 4.2 volts, but, depending on the purpose of the battery, can limit the minimum voltage in different ways discharge. So, in the battery, designed for, say, the screwdriver or motor model of the car, the minimum voltage will most likely be really minimally permissible, and for the PDA or smartphone - higher, for the minimum voltage of 2.7 volts may simply not be enough to work the device's electronics. That is why in complex devices like phones, PDAs, etc. The controller battery itself complements the controller in the device itself.In the second group
Includes operating rules that we can influence with you, thereby significantly increasing or decreasing the battery life. These rules are as follows:
1- you need to try not to bring the battery to a minimum charge and even more so to the state when the machine turns off, but if it happened, charge the battery as soon as possible.
2- No need to be afraid of frequent recharging, including partial when the full charge is not achieved. The battery does not harm it. At the same time, I am guided by common sense: if with the usual use of the PDA, I always put it for charging before bedtime, then in the case of very intensive use (constantly included WiFi, listening to music, etc.) when the charge comes close to the minimum, do not bend straight At work, connect the PDA to any USB accessible. In the absence of a normal charger and using the USB instead, the USB is particularly important not to wait for a complete discharge, because, in this case, the current from the USB port may not be enough to start the charging process.
3- Contrary to the viewing of many users, the reload is harmful to lithium batteries no less, but even more than a deep discharge. The controller of course controls the maximum charge level, but there is one subtlety. It is well known that the capacity of the batteries depends on temperature. So, if for example, we charged the battery at room temperature and got 100% charge, then when you exit frost and cooling the machine, the degree of charge of the battery may decrease to 80% and lower. But there may be a reverse situation. The battery charged at room temperature up to 100%, being a little heated, will become charged, say, up to 105%, and this is very and very unfavorable for it. Such situations are found during the operation of the machine, for a long time in the Credle. During operation, the temperature of the device and with it the battery rises, and after all the charge is already full ...
In this regard, the rule says: if you need to work in the cradle, first disconnect the machine from charging, work on it, and when it comes to the вЂњcombatвЂќ mode - connect the charging.
By the way, this rule also applies to owners of laptops and other gadgets.Added by:
in modern laptops, charging controllers work correctly: they monitor the temperature and mode of operation of the computer, while there is no need to perform certain actions when working from the outlet.
4- The ideal conditions for long-term storage of the battery is to be outside the device with a charge of about 50%. A working battery does not require you to take care of yourself for months (about six months).And finally, some more information.
- Contrary to the prevailing opinion, lithium batteries, unlike nickel batteries, have almost no вЂњmemory effectвЂќ, so the so-called вЂњtrainingвЂќ of a new lithium battery makes little sense. For your own reassurance, it is enough one or two times to fully charge-discharge a new battery, mainly for calibrating an additional controller.
- Device owners know that you can charge the battery both from the charger and from USB. At the same time, it is often forgotten by the impossibility of charging from USB. The fact is that by "law" the USB controller must give peripheral devices connected to it, a current of about 500 mA. However, there are situations when either the controller itself cannot provide such a current, or the device is connected to a USB controller, which already hangs some peripherals that consumes some of the power. So lack current for charging, especially if the battery is discharged too much.
- Lithium-containing batteries do not like freezing. Always try to avoid using the machine on a hard frost - get carried away - the battery will have to be changed. Well, of course, if you got the machine out of the warm inside pocket of your jacket and took a couple of notes or calls, and then put the animal back - there will be no problems.
- Practice shows that lithium batteries (not only batteries) reduce their capacity with decreasing atmospheric pressure (in high mountains, in an airplane). Harm to batteries does not bring it, you just need to take into account this fact.
- It happens that after purchasing an increased capacity accumulator (I will say 2200 ma-h instead of a regular 1100 ma-h) The machine after a couple of days of using the new battery begins to behave strangely: it hangs, it turns off, charging the battery does it seems, but somehow strange and t .P. It is possible that your charger that works with success on the "native" battery is simply unable to provide a sufficient charge current of the large capacity battery. Exit - purchase of a charger with a large current current (let's say 2 amps instead of the former 1 ampere).
For those who speak English, I can recommend a great "educational program" for batteries, including the principles of operation of controllers, etc. -http://www.batteryuniversity.com/index.htmPost has been editedslimest - 18.09.15, 17:09
Reason for editing: Edit, +1 by dar7