Why are the same mobile phones, the same battery, some people have long standby time, some people may have a short standby time at first, in fact, the battery is not fully activated, although most Samsung batteries are now activated at the factory. Processing, but not complete, so there will be a long period of standby time after a period of time, I personally tried a lot, including what is the 12-hour activation method on the Internet, but it seems that the effect is not as follows:
Because most of the water machine's charger is fake, so we still use the original direct charge to compare insurance, and the effect seems to be a direct charge better, first of all, the internal power is used up, usually virtual power, Not used.
Charge with direct charge, usually 1-2 hours, the phone will be full, do not pull it out immediately, let him properly charge for a while, usually about 10 minutes, then dial the direct charge, over 10 Re-plug in the second or so, so that the phone will display the charging again, about 10 minutes will display full, do not pull out immediately, but also after a while to unplug, and then use the phone to recharge when there is no power or low battery warning, The first three times with this method, basically can fully activate the battery, the effect is definitely better than charging 12 hours.
After charging, you can use the relevant instructions to check the voltage. Generally, it will be 4.1V-4.2V, so the charging is completely charged!
The friend's book was bought by Founder é¢ and 8100 in October 2000. The battery is dead for more than 1 year, the remaining battery is always 0%, and the charging indicator is always green. My friend used the "discharge method" that I introduced, and ventured short of positive and negative. Originally worried, looking forward to sparks, the results are quiet. Then find a multimeter, the voltage is zero. Then use the multimeter current block to discharge, the gear from high to low, the result is no current. At this time, the author suspects that the battery pack is internally broken.é‚ Decided to die as a living horse doctor, turn on the battery thoroughly DIY one time.
Carefully open the battery. This battery pack consists of 8 Panasonic lithium batteries, each section is slightly larger than the usual 5th battery, and there are two small boards. Each two cells are connected in parallel and then connected in series. Use a multimeter voltage block to measure the two poles of one of the parallel batteries, the voltage is about 4V; then measure with the current block (2.5A), the test leads quickly touch, the pointer hits the far right, and see spark splash. It seems that these two batteries are not broken! In this way, the measurement is continued. As a result, the batteries connected in parallel in the last two sections have neither voltage nor current, and the resistance value is infinite. It seems that the problem is here.
Two batteries with suspected problems were welded, and then treated with "discharge method" and "high pressure bombardment method". The results did not respond. In the face of the remaining 6 good batteries, I think, can they let them take over this responsibility? Use a soldering iron to remove 1 knot and arrange it to the last position, so that the four batteries are connected in parallel, and then connected in series with the other two sections to obtain a voltage of about 16V. Then take out two waste batteries, close the cover and install the machine.
First charge in the off state for about 1 hour and 8 minutes, the charging indicator turns from orange to green. Turn on the power, turn on the power meter, and display the remaining battery power of 23%! And the display is charging! It seems that the charging indicator is not correctly indicated. Continue to charge in the power on state (the charging indicator is always green), after charging for about 20 minutes, the display power is 100%.
Verify DIY results - browse offline pages with battery support. After 23 minutes, the battery low warning is popped up; in the 26th minute, the machine goes to sleep; immediately wakes up, and by the 28th minute, the machine emits a beep, the charging indicator turns red and flashes; in the 34th minute, the machine is completely powered down. After several charge and discharge experiments, the average charge is about 2 hours per charge, and the discharge can support about 45 minutes. (At present, it can only be used temporarily. When you buy two lithium batteries, you can use them normally!) With the passage of notebooks, many friends obviously feel that the battery is aging and the battery life is shortened. In addition to buying a new battery, is there a way to repair the battery?
Overcharging and over-discharging will cause permanent damage to the positive and negative terminals of the lithium-ion battery, which is the battery life problem.
But more importantly, if the charging process is interrupted by accident, the internal chemical reaction will undergo complicated changes, which may affect the battery life. For this reason, deep discharge and charging is a good solution for protecting laptop batteries.
Many brand-name notebooks, such as IBM's ThinkPad series, have dedicated discharge software. If your notebook does not have dedicated discharge software, you can follow the steps below. First disable the screen saver, set the power scheme to "always on" in Windows Power Management, and set the "Low Battery Alert" to 10% and the action to "No Action" in the Alerts tab. Then set the “Battery Critical Shortage Alarm†to 3%, the operation is “Waitâ€, and the screen brightness is adjusted to the highest. Save all previous work data and confirm that the battery is charging more than 80%, unplug the power supply and all external devices.
After the discharge is finished, the notebook will automatically shut down, and then plug the power supply to charge the notebook. This process can be repeated 2~3 times. In fact, the purpose of this practice is to allow the battery to continue to discharge at a small current, which is impossible to achieve in our daily use, and the effect is basically the same as those of dedicated discharge software.
If there is still no obvious effect at this time, then it is basically impossible to recover the battery, and it is possible to consider replacing the core of the lithium ion battery pack. It is necessary to take it out. In the case of ensuring continuous supply of power without power failure, it should be taken out, because the average laptop battery is automatically discharged (except for high-quality computers such as IBM), and the battery life is generally 400 times, repeated charging will Reduce battery life. Here are some battery maintenance tips that I hope will help you. The battery of the notebook computer basically has
Nickel-cadmium batteries
A conventional rechargeable battery is a nickel-cadmium battery. They are relatively rough and easy to recharge (fast and slow). If the processing is improper during the charging process, that is to say, the memory effect occurs, the original capacity of the battery is reduced. The so-called memory effect is that the battery is not completely discharged before the battery is charged, which will cause loss of battery capacity. You can improve the memory effect by re-adjusting the battery usage, that is, fully discharging and then fully charging. The word "complete" must be emphasized. In addition, nickel-cadmium batteries also have an impact on the ecological environment. Because cadmium is toxic. Even if battery recycling becomes common, these batteries are likely to be thrown away due to natural elimination.
NiMH batteries
The next technology for laptops is nickel-metal hydride batteries, which have been in production for several years. Nickel-metal hydride batteries no longer use toxic cadmium, and their storage capacity is 20% higher than that of nickel-cadmium batteries. In addition, the memory effect is virtually gone. Note that frequent overcharging will reduce the battery life, so it is necessary to control the charging time. NiMH batteries are about twice as expensive as nickel-cadmium batteries.
lithium battery
The latest battery used in laptops is a lithium battery, which can be used in laptops and mobile phones. Lithium batteries provide about twice the energy compared to nickel-cadmium batteries. While the performance has improved significantly, its price is more than three times that of nickel-cadmium batteries.
Most laptops take eight hours to fully charge, but in general they can charge 75% of the electricity for the first four hours, while the remaining 25% will take more time. The important point is that you must discharge the battery before charging. Most users use a wall outlet when they use their laptop, and they rarely use a battery to power the laptop. There's nothing wrong with keeping your laptop plugged in. In most new laptops, there is a sleep mode that consumes very little energy. As soon as you reopen the screen, you will immediately return to the state you left when you left. If you plug your laptop into an external power source, you should release the battery power from time to time. If you are going to use a laptop for two or three hours in a row, it is best to unplug it, use the battery until it drains the battery, and then plug it in. On the other hand, if you really don't use your laptop, turn it on, drain the battery and plug it back in. At least one or two times a month, laptop batteries are divided into nickel-cadmium, nickel-hydrogen, lithium-ion, etc. according to the core material. Lithium-ion batteries require precise protection circuits for charging and discharging, and the production industry is more complicated. Therefore, lithium-ion batteries are used. The production cost is high.
Repair method:
Firstly, the battery case is made with a special tool, and after the cause of the fault is investigated, the battery pack of the sorted test is welded. It is better to set the relevant parameters of the control circuit board, and the casing is sealed after the debugging is correct. This battery can be used normally. Before making the battery pack, we used the battery characteristic analyzer imported from the United States to screen and analyze the battery. It is required that the tolerance of the same battery does not exceed 1%, and the charge-discharge characteristic curve of each battery is required to be completely the same. This step is the most important. If it is not done well, it will cause various problems, such as short standby time and insufficient charging. It can not charge normally and work normally. The service life is very short. When the battery is discharged, the battery will corrode the notebook, and even cause the whole battery to explode or burn the computer and other vicious accidents.
When the battery is made into a core, it is necessary to use special welding equipment, and the connecting piece is generally welded to the battery in 0.02 seconds or less. Do not use manual soldering iron for soldering. Otherwise, the performance of the battery will be attenuated or the life will be shortened. Serious battery leakage or explosion may occur.
It should be noted that it is not possible to use different manufacturers or different batches of batteries from the same manufacturer in the same battery, otherwise it will cause various possible failures.
After the repair:
Most of the models will have almost invisible traces, and a small number of models will leave a slight opening. In terms of internal power, for the models produced two years ago, the performance after repair is generally better than when the battery is not bad, because the batteries used at that time are mostly quality parameters that have been eliminated now, for example, production in 1998. The capacity of a single-cell battery of lithium battery is generally 1600mAH, and the capacity of the same type of products is now 1800mAh. For the recent models, the repaired battery is basically the same as the original capacity, and the service life is the same as the original battery. the same.
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