How to charge a new lithium polymer battery?

1. Don't overload. (How long does it take to charge?)\r\n\r\nLithium batteries are already activated when they leave the factory, which is why some marketers still support the outdated "activation" theory , which is very harmful. In fact, when the battery is fully charged, the overcharge protection circuit activates, cuts off the charging power, and the battery begins to discharge. After being discharged for a while, it begins to charge again, thus alternating between. charging and discharging (see principle of overload protection circuit above). Charging and discharging in this manner will actually shorten the battery charge cycle (discussed later). Generally, lithium batteries will be fully charged in 2-3 hours. After 90%, the charging process may take up to 1-2 hours. That is, charge for 4-5 hours, no more than 6 hours. \r\n\r\nThe so-callednt new battery should be fully charged for 12 hours the first three times. This is common sense in the age of nickel-metal hydride batteries. It's not impossible to load it like that. , and you probably won't have any problems charging it. Lithium batteries have protection circuits and the battery will not be damaged. However, once the protection circuit is activated, the battery will enter a "discharge-charge-discharge" cycle, which invisibly uses unnecessary charging cycles and reduces battery life in disguise. . lifetime. We do not exclude the possibility that some poor quality lithium batteries may cause problems after long-term charging. \r\n\r\n2. Don't overdo it. (When should you charge the battery?)\r\n\r\nMany people always think that there is an upper limit to the number of charging times of lithium batteries (in fact, it is not theshadow of charging time, but the charging cycle - I'll talk about it later), so every time just try to use the battery as much as possible and don't charge it until it dies automatically. It's actually not good. It is easy to cause excessive discharge. Excessive discharge has a direct impact on battery life. Perhaps one to two complete discharges will result in the battery being discarded. Therefore, the battery can actually be charged to 10% and the minimum should not be less than 3%. \r\n\r\nThe most likely cause of excessive discharge is using a cell phone outdoors. The battery is used to the point that it automatically turns off and cannot even be turned on. However, the charger is not brought. , so it cannot be charged for a while, therefore the battery is over-discharged due to self-discharge, which is themost likely situation. Another situation is that the battery has been unused for a long time, but there is not much energy before storage, causing the battery to "chronically commit suicide". \r\n\r\nCurrently, some equipment will remind you when the battery is still at 5-10%, then automatically turn off at the second reminder. It is estimated that the second time it was only 2-3%, and the remaining power is already very low. Therefore, it is strongly recommended not to try to turn it back on after the device has automatically shut down. The most important thing is to charge it as quickly as possible. It's best to bill proactively before the first reminder. \r\n\r\n3. What is the charge cycle (or charge-discharge cycle)? \r\n\r\nMany people think that the lifespan of a lithium battery is the number of times charged. This is actually wrong, it should be called the cycle ofcharge. A full charge cycle consists of charging to 100% and then discharging to 100%. The lifespan of a lithium battery is approximately 300 to 500 complete charge cycles. The correct statement regarding lithium battery life should be 300-500 full charge and discharge times. \r\n\r\nThat is, suppose a battery is 100% full: 50% used and 30% charged. It's not a complete cycle. A full cycle is two 100% charges and discharges. is a 40% cycle. When you have used 60% and recharged 40%, it will be a 90% cycle. By analogy...\r\n\r\nLithium batteries do not have a memory effect, so I agree with Apple's proposal that the use of lithium batteries should consist of use, charge some and don't charge them for too long and don't use it. \r\n\r\n4. The environment in which lithium batteries are used\r\n\r\nUsageof lithium batteries in too hot or too cold environment will also impact the life of lithium batteries, so do not use it in hot weather. Leave your phone in a car or expose it to the sun; in winter, if it is more than minus 20 degrees outside, do not take your phone out to heat it (prolonged exposure); ), but put it in a warm pocket and use headphones (don't use bluetooth headphones either, those have lithium batteries too). \r\nQuote:\r\nLithium-ion polymer battery: The temperature range is 0 ~ +45℃ when charging; the temperature range is -20~+60℃ when discharging; the long-term storage environment of the battery is: temperature -20 ~ +35℃. \r\n\r\n5. What to do if the lithium battery is not used?\r\n\r\nThe self-discharge rate of the lithium polymer battery is still a little high. For safety reasons, yes. it is not usefulized, it is best to charge it fully first, then put it in a sealed plastic bag and put it away. It should be removed and used once every 1-2 months, that is, charged and discharged once to maintain lithium ion activity. It should not exceed 3 months maximum and should be removed and recharged only once. If stored for too long without use, lithium ion activity will decrease, impacting battery life. \r\n\r\n6. Do you want to enable USB charging?\r\n\r\nMore and more devices now support USB charging. Personally, I don't think it matters. the above reasons are the same. However, for USB charging, I saw a friend post saying that charging was insufficient due to insufficient voltage (I have never encountered this with a PDA, and it may be fully charged. I don't know why the 580 can't). I havealso encountered the same situation. From a usual point of view, I still don't want to have to charge it for a while every time I plug in the USB. It's mainly a matter of habit, so I turn off USB charging myself. If there is no power supply, you can turn it on again to recharge it, which is still convenient. At the same time, I don't know if charging a cell phone under non-standard voltage will have any impact on the cell phone and the battery. Without knowing the truth, people tend to turn off USB charging as much as possible. \r\n\r\n7. What is the best way to invoice? \r\n\r\nThe last little suggestion is that it is better not to use off-brand chargers to charge original lithium batteries, just use hardware + original chargers, or d buy original base chargers. Since off-brand chargers uset often non-standard voltages and currents, they can damage the original batteries. Especially the old-fashioned charger with discharge function, be careful not to use it if you discharge it accidentally, the battery will be destroyed. \r\n\r\nAlso, a friend later asked about using other brand lithium batteries, so I'll mention that here by the way. My personal opinion - imitation batteries Original batteries (actually fake original batteries), as well as real off-brand batteries, mainly use lithium-ion batteries (because the cost is relatively low and the production cost of lithium-polymer batteries is relatively high). On the one hand, the power Definitely not as good as lithium polymer batteries (lithium polymer batteries are denser). Additionally, lithium-ion batteries are not as safe as lithium-polymer batteries. There have been many incidentsnts of battery explosion and spontaneous combustion in laptops (not many on cell phones, but there are some), due to lithium instability. -Ionic batteries after prolonged use. \r\n\r\nTherefore, branded batteries should not be overcharged. Don't expect a longer charging time to improve the battery just because the power usage time is short. Also, if the off-brand battery has been used for a long time, replace it as soon as possible. Don't hesitate, safety comes first. As for charging, you can use anything, be it a branded charger or a cell phone, it should have no impact on the cell phone (I guess I haven't done any research).