Please click to enter a description of mobile phone batteries in series
Through my own testing, I found that when separately charged mobile phone lithium batteries are connected in series, series to be discharged, one of them was directly discharged to 0 V, and the other was directly discharged to 0 V. The node voltage is always greater than 3.71. It cannot be discharged evenly at all.
Is there a difference between using USB and wired charging for current cell phone lithium batteries? Do you need to charge it for 12 hours?
Of course, it can be charged separately. In fact, this circuit of using (discharging) in series and charging separately is not uncommon. Almost all series-connected lithium battery circuits will use this method. The reason is that lithium batteries are very sensitive to charging voltage. A tensionA slightly higher rate will damage the battery. Once one section of a series-connected battery is damaged, the rest will also be affected. Eventually the whole thing could be scrapped.
Well, there is a difference. Many people think that USB charging and wired charging on computers are the same. Actually, that's not true. The wired charging itself has a voltage regulator to convert the rated current. It is safer and more efficient to use and does not damage the current. However, the computer's USB interface does not have a voltage regulator, when there is a problem with the computer you are connected to, charging can easily cause the phone to suddenly heat up or burn the battery. I experienced it myself. It cost more than 100 yuan to repair my cell phone. Therefore, I recommend you to generally use online recharge or recload per seat. As for the poster's question about whether lithium batteries need to be charged for 12 hours > no need to charge for 12 hours, lithium batteries have very good energy storage properties, and generally 3 to 4 hours are enough.