About cell phone battery charging those things

You should understand the concept of charging, the concept of charging is not similar to the rated power, not constant current is the best, but the paragraph ~ ~ Simple explanation, for the iphone 4来 said: Less than 140 ma, the equivalent of trickle charge 140~300 mah charging current equivalent to slow charging 300~ Charging currents between 1 A can be called fast charging (just a different degree) than 1A equivalent to ultra-high-speed charging even if it is actually close to 2.5A, it is not not possible, but will damage the battery because the battery life is not the current size itself, but the heat generated by the large current, The stability of the temperature is the most important culprit of the battery life ~ ~ Next is the speed ~ ~ In other words may be easier for you to understand: we all know whether Ni-mh lithium battery or lithium polymer batteries, are chemical batteries, electricity generation is a chemical effect, then to a chemical effect of the biggest factor is what? Undoubtedly, is the stability, and the current size itself only affects the speed of chemical reaction, the effect on the stability of the chemical effect of the battery is not small, so the stability of the biggest impact, there is no doubt the temperature, so generally can not be used too large current to fast charge, because the temperature rise too fast, natural heat can not meet the release of temperature It is likely that the battery's chemical reaction is unstable and a lithium explosion occurs. As for my so-called speed, refers to the speed of the chemical reaction, battery charging is actually applied to the battery at both ends of the voltage to the internal positive and negative electronic re-separation of the position, generating internal voltage, but this "bit" speed is limited, not the faster the better, one current too large temperature will be high, and secondly, too fast, is unable to achieve the final stability of the current filled (you can understand that the two-cylinder water, you have to make two-cylinder water is the same high, must be in the initial rapid pour water, finally slowly pour water, adjust to make it both highly consistent) in fact, most of the charger, will be through the IC to the current segmented control, generally divided into two The previous stage with high current fast charge, raise the voltage, until the voltage to a certain value, into the second stage, into a small current charge, to protect the battery, so no matter how you increase the charge voltage, you can only reduce the time of the first phase, and from the second stage, basically time is constant, because only into the high-precision trickle charging, To be able to really fill the battery capacity (trickle is generally less than 100 ma), so you will find that no matter what a device has a fast charging function, the manufacturer's manual can only write "xx hours (minutes) filled with 80%~85% power", and really to fill, time is much higher than this fast charging time, Because the final stage everyone must be transferred to trickle Charge ~ This part of the time is not much difference ~ ~ seems to say complex ~ ~ Ha ~ actually for the landlord, meaning that, whether you use 1A to charge or 500 Ma to charge, actually only affect your total charge time, but from the battery point of view, Slow charge is better than fast charge for life, understand? Of courseIt must be said that this effect is very slight, because the final stage of charging is Trickle charge, your current size only affects the first stage of the fast charge, the total capacity of the biggest impact of the "trickle charge", the final condition is always satisfied

About cell phone battery charging those things