Notebooks use lithium batteries
Now use the notebook more and more people, as the notebook one of the main components of lithium battery problems have also increased. So how should make good use of the laptop's lithium batteries do? Is to grasp two points:
1. Due to current red discharge.
2. To minimize the discharge less than the over-charge or discharge.
While the battery is a consumable, lithium-ion battery is no exception. However, no one wants to use the battery up the fine spirit of God, not the age that you snap on the end, no one wants to own the very beginning, half dead battery does not pull a living, this has been the rub in 2023, making good You realize how little value is the case, you do not say that?
Well, get down to business, following the battery began to speak. To explain, is limited to lithium-ion battery.
Appropriate to charge and discharge current
Literature in general and the state on the standard lithium-ion battery that the lithium-ion battery charge current should be between 0.2C to 1C. It is said that the capacity of the battery charge current, such as your battery is 4AH, then the 0.2C charge current is 0.2X4 = 0.8A, in other words, the charge current should be between 0.8 to 4A. In general, in charge current to the extent permitted by the smaller the better, rechargeable lithium-ion battery to start charging current stage should be, in my IBM R31, this current is 2.8A or so, which is equivalent to 0.7C, is charging its own circuit Control, can not be set. This indicator does not charge more than the standard, but do more, especially when using the battery capacity decline for some time after the charge current may be more than 1C. Now the length of time charge notebook users have also become targets regardless of the manufacturers were forced to charge current set so high.
So the first step is to reduce the charge current. I have friends working in the laboratory, a variety of readily available equipment, where he is on trial for a moment. Power output in the first string on a try resistance, the outcome of the current is reduced, but became intermittent charge, which is not a good thing. Through trial and error, 4 Ohm is a more ideal value, this time around 0.8A charge current is, very stable. This is only run through the machine's current power supply interface, the battery charge current estimated number of large, it should be slightly larger than 0.2C. Specific to a different machine, this value may be different. With the addition of the increase in battery voltage, charge current will be reduced, but decreased only slightly less than 0.05A. In such a state of charge, charging circuit seems to be not working, the battery indicator light is not bright. Such as the battery voltage up to 12.6V, charging circuits came into play into the battery trickle charge, at this time whether the series has resistance does not matter, the charge current by the charge control circuit, the last full charge after the end of the circuit automatically charge. The entire charge time is about 5.5 hours, if not resistance, charging time is about 3.5 hours.
Lithium-ion batteries is very precious, good charge control circuit is necessary. This charging method can reduce the charge current, battery life, while at the same time the use of the books of the original charge of the charge control circuit, it is also relatively simple to achieve, just buy a plug (from the power supply into books The kind, it is best to buy two, referred to the back of a method also used to good quality) and a can of resistance, resistance attention to the larger head, above, after all, there are about 2W of power Otherwise, it would be more heat resistance, the best use of their constant resistance to be a wire, the wire resistance of the resistance and temperature has nothing to do basic. But the shortcomings of this approach is obvious, that is not in charge of the work at the same time with books. Another charge when there will be a strange phenomenon, I do not write omitted here, you try to know, the good news is this phenomenon into the trickle charge after the state disappeared. Charging time is not a big deal, anyway, before the charge to sleep at night, wake up the next day on the charge Well, of course, if you are a person who goes to bed to bed or short-time special, it is a different matter. f4098a, f4809a, f4812a, 319411-001, presario 2100, presario 2500 Small charge current issue is resolved, the issue is now the turn of the discharge. In fact, this is difficult, after all, the book is designed to work, the discharge current will work with the state vary, here referred to the method used to be limited to special battery capacity to resume operation.
Start machines, power management settings do not always sleep (standby) and hibernation (hibernate), as are most other power-saving mode, including the CPU speed, hard drive shut down, turn off the display, and so on, and TP in the management process Do not have to shut down some of the hardware, such as sound cards and so on, and then open the battery status display window, to run in front! ! ! The closure of other programs, in particular, screen saver and the other from time to time to run the program! ! Do not use the machine, do not close the lid and let the battery discharge end (not to discharge the minimum value set to 0, I set up 3%). Display and hard drive shut down after the discharge current is about 0.5A, this is my IBM R31 can be achieved at the minimum discharge current, battery discharge to the minimum value after the machine will automatically shut down. Continue to discharge the entire time about more than 4 hours, according to your battery capacity may be different, this time to sleep is also a way to use the pass.
Well, the last to stress that the above-mentioned method is not dead, especially the discharge, there are ten time will be able to do so, otherwise the battery still doing? Charging the best use of small current charge, of course, if the battery urgent need for a direct power supply to plug inserted in the book on it.
I used this method of battery, put a charge 14 times the capacity has been maintained at over 45, and the design of the battery capacity is 43.2, which is also declining, but this release Filling time after the restoration of.
Speaking at the beginning of the two points, one appropriate charge and discharge, and the other is not to discharge less than the charge, discharge following a look at how to solve the problem of lack of charge on it:
To minimize the discharge less than the over-charge or discharge
In fact, a very good solution to the excessive discharge, not to terminate the limits of the discharge can be so low, I have been using 3%. f2299a, f3172a, pavilion zt1000 Often do not use batteries may be a long time, such as the battery remaining 70%, if the power switch, then the battery is automatically recharged, there will be no such a cycle, although battery life is not a cycle in order to set the absolute number of dead, But always it will reduce the capacity of the battery, lithium-ion battery was no memory effect, but it is just a memory effect it is relatively low. Unfortunately, IBM did not provide the solution to the shortage of charge-discharge method, but provides a solution to this problem. And that is what I found on the R31 may not necessarily suitable for other machines, but the method should also be more or less the same, you try not to forget after it posted for all to share.
R31 charging circuit based on the situation of the power to decide whether to charge the battery. Power output voltage is 16V, the error of plus or minus 0.2V, if the voltage lower than 15.5V, so not to charge the battery charging circuit, and the book can work, which is provided by IBM to solve the problem. But this is the basis of vulnerability, as if the lower voltage 15.2V, books will be converted to use battery-powered, plug in the power supply even if the books will be of no avail. In other words, we can toss the space is 0.3V.
If you can find a 15.5V, over the current 3A switching power supply, then the problem is solved, otherwise please continue to look down.
The power to reduce the output voltage 0.5V is not an easy thing, the series resistance is not ideal because of the resistance as the current size of the voltage changes. I use the diode rectifier to permit the adoption of the current 2A above, otherwise the heat pipe. Rectifier diode forward voltage drop in the 0.7 to 0.5V, just to meet the requirements. Now this type of electronic tubes in the market are so high, the prices of less than 2 yuan. Specific to a different book may be different, it is best to install on-hand when there is a digital multimeter Test. Pipe is being in the series of power output, and then followed his own to buy a power plug inserted in the book. Then the anti-diode does not matter, be it the script does not work, and then in turn connected to it.
Like, power output voltage drop of 0.5V or so, if the drop too much, the book will switch to the battery, if the drop too low, the book will charge the battery, in particular how much you want to book their own tried to know.
Of course, if your battery has been full of this circuit there is no need, you can not have it, directly to the power output in the next book on it. f2019, f2019a, f2019b, omnibook 6000 Come to an end, the beginning of the two issues are resolved. Now you see the results of the test, it is estimated that in the book different results could be different, the best ones to take a circuit to try to avoid it took 10 innocent money 
Finally, I wish you good luck! You make good use of lithium batteries it!
To remind:
In the modified plug when the mistake is easy to engage in anti-polar (diodes engage in anti-polarity does not matter), so you must double-check by measuring multimeter and a different color of the wire connection is negative. I do not know engage in anti-polarity power supply will not burn the books, did not try!