Operation method
Many friends will choose to use up the phone battery as soon as possible and then charge it continuously for more than 12 hours after purchasing the new Apple iPhone. Many friends are even happy to turn off the phone for charging. However, more and more Apple iPhone users have learned from different channels that this charging method is not scientific, and the charging time guided by the mobile phone manufacturer is just full. How and how long should I charge the Apple iPhone battery? There have always been such blind spots. Today we will analyze these problems in detail for you.
First of all, let's talk about some principles of mobile phone batteries. The author is not an expert in the chemical field, so we will focus on it. Everyone can understand it normally. At present, the secondary batteries used in the market are mainly nickel metal hydride (Ni MH) and lithium ion (Li ion). Now all mobile phone batteries are lithium ion batteries (hereinafter referred to as lithium batteries). For lithium batteries, you only need to remember two points: 1. lithium batteries do not need to be activated, 2. lithium batteries do not have memory effect.
The lithium battery has been activated and pre charged by the manufacturer before it came out, which is why we found that the battery was charged when we bought a new machine. In fact, after the lithium battery is produced, it is charged at constant voltage, and then discharged through several cycles of charging and discharging, so that the electrode is fully saturated with electrolyte, and the lithium battery is fully activated. Therefore, the new lithium battery we bought is no longer a new battery. It has been activated before leaving the factory. We can use it normally, and do not need to deplete and recharge the battery for the first three times (deep discharge). The author here provides an experimental table on the charging and discharging cycles of lithium ion batteries. The data on the cycle life of lithium batteries are listed as follows: cycle life (10% DOD):>1000 cycle life (100% DOD):>200 cycles, where DOD is the abbreviation for the depth of discharge. According to the formula, the charging times of 10% deep discharge are far higher than the charging times of full deep discharge. This can also explain why many netizens' mobile phone lithium batteries have been deeply discharged and then turned on ineffectively. In fact, this is because the voltage of the battery is too low due to excessive discharge, so that normal charging and power on conditions are not available.
