Grasp the two Main Laptop Batteries

Now more and more people use the notebook, also will appear as notes of experts, one of the main components of this lithium battery good notebook lithium batteries? Laptop lithium hp Pavilion dv9000 Series Battery? Grasp two things:

1. To appropriate current charge and discharge.

2. Minimize discharge insufficient charging or excessive discharge.

Although the battery is a consumable, lithium ion batteries are no exception. But everyone wants to own battery fine spirit of God, to age and do not rattle're finished, no one wants to own battery on the half-dead not to pull a living, has been to the edge of the two or three years, good people taste tasteless is how is it that you say is not it?

Well, get down below began to talk about batteries. To explain, confined to the lithium-ion battery.

An appropriate current charge and discharge

General literature and national standard lithium-ion battery, said the lithium-ion hp 484170-001 battery charging current should be between 0.2C to 1C. This is with the charging current of the battery capacity, such as your battery is the 4AH then is 0.2X4 = 0.8A 0.2C charging current means that the charging current should be between 0.8 to 4A. Generally, the charging current is as small as possible in the permitted range, the lithium-ion battery charging beginning of constant current charging, in my IBM R31, this current is 2.8A, equivalent to 0.7C is charging circuit control, can not set. Although no such charging indicators exceed the standard requirements, but is actually relatively large, especially when the capacity of the battery used for some time after the fall of the charging current may be more than 1C. The laptop charging users care about the length of time has become indicators, manufacturers were forced to charging current is set at such a high level.

So the first step is to reduce the charge current. I have a friend working in the lab, and a variety of equipment ranging test him. First string on the power outlet on a resistor try, the results of the current is reduced, but became intermittent charging, this is not a good thing. After trial and error, 4 ohms is an ideal value, and this time the charge current is about 0.8A, very stable. This is just the current flowing through the machine power connector on the battery charging current is estimated to be larger, it should be slightly larger than 0.2C. Specific to a different machine, this value may be different. In addition, as the hp HSTNN-LB11 Battery voltage increases, the charging current is decreased, but the decrease amount is small, less than 0.05A. In this state-of-charge, the charging circuit does not seem to be working, the battery indicator is not lit. Such as battery voltage rises to 12.6V, the charging circuit kicks in, battery trickle charge state at this time whether the series resistance is irrelevant, the charging current is controlled by the charging circuit, charging circuit automatically end after the last full charge. Throughout the charging time is about 5.5 hours, if not resistance, the charging time is about 3.5 hours.

The lithium-ion hp Pavilion DV7 series Battery is very delicate, and good charge control circuitry is required. This charging method, can reduce the charging current to extend battery life, while use of the books of the original charging circuit controls the charge, it is relatively simple to implement, just buy a power plug (that is, from the power supply into the books the kind, it is best to buy two, the latter also with a good quality) and a resistor can, pay attention to the resistance tall, after all, about 2W power consumption , otherwise the resistance will be more heat, it is best to do a constant resistance wire, almost independent of the resistance and the temperature of the resistance wire. However, the disadvantage of this approach is obvious, is not in charge, while working with books. Another charge when there will be a strange phenomenon, I omitted to write, you try to know Fortunately, this phenomenon disappeared into the trickle charge state. Charging time is not a big problem, start charging anyway, before going to sleep at night and wake up the next day and charged, of course, if you are a night owl or sleep special short time, that is another matter.

Small current charging problem solved, and now discharge problem. In fact, this is difficult, after all, the book is used to work, the discharge current with different working status different methods mentioned here is limited specifically to restore the operation of the battery capacity.

Start the machine, the power management set never to sleep (standby) and hibernation state (hibernate), and others are set to the most power-saving modes, including CPU speed, turn off the hard disk, turn off the monitor, the other in TP management program close some do not have the hardware, such as a sound card, and then open the hp ProBook 4510s Battery status display window and let it run in the foreground! ! ! Close other programs, in particular, is a screen saver and other timed run program! ! Do not use the machine, do not close the lid, and let the battery completely discharged (discharge minimum value should not be set to 0, I set 3%). Display and hard drive shut down after the discharge current is about 0.5A, which is able to achieve on my IBM R31 minimum discharge current, discharge the battery to the machine will automatically turn off after a set minimum value. Entire discharge lasted about more than four hours, depending on the battery capacity may vary, also used this time to pass sleep.

Finally, to emphasize that the above method is not dead, especially discharge ten times there time to do so can, or else even battery Why? Charging the best are charged with a small current course, if much-needed battery directly to the power plug is inserted in the notebook can be.

My battery using this approach are now charging and discharging of 14 times, the capacity has been maintained at more than 45, while the battery design capacity is 43.2 during decline, but this charge and discharge time after all restored.

At the beginning about two points, one is the appropriate charge and discharge, the second is not to discharge less than the charge, the following look at how to solve the discharge insufficient to charge: