HP Notebook PCs Batteries: Improve life cycle of HP Laptop battery

 NOTE: Improve life cycle of HP Laptop battery

The battery life varies according to configuration and product model, loaded applications, configurations, power management product and the resources used by the user. As with all batteries, the maximum capacity of this battery will decrease with time and use.

As mobile computing extends, users need to understand how environmental and usage factors affect the duration of load and service life of the battery. This document explains these factors, describes the Smart Battery Technology built into HP notebooks, and recommends practices to maximize battery life. Improve life cycle of HP Laptop battery

HP takes seriously the issue of security of the battery and provides data sheets Material Safety Data Sheet (MSDS) (in English) that provide information security in general regarding batteries third (non-HP) that used in HP products and throughout the industry. In addition, HP works closely with third party battery suppliers to carry out continuous improvements in design and safety, and offer higher levels of security and reliability. In the unlikely event that there is a safety issue, HP uses the best proven processes and works with the appropriate regulatory agencies around the world to provide the highest possible level in terms of safety and a better experience customer.

A lithium-ion battery is composed of several cells connected in series and in parallel based on the voltage and power requirements of the device. HP Notebook PCs use lithium-ion batteries with 3 different types of cells: cylindrical, prismatic and polymer.

• The cylindrical cells are approximately 18 mm (0.7 inches) in diameter by 65 mm (2.6 inches) long and is commonly known as the cell 18650. These cells are frequently used in the batteries of 20 mm (0, 8 inches) thick.
• The prismatic cells have a thin, rectangular shape; the most common types are the lithium ion battery cells 6 and 8, which are approximately 12 mm (0.5 inches) thick, such as batteries for MultiBay and Tablet PC HP.
• The polymer cells are thinner than prismatic cells. Often they used in products such as the IPAQ Pocket PC and some ultra – portable devices that require batteries less than 10 mm (0.4 inches) thick.

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• How long does the battery of a notebook?
• Configure power plans Battery notebook
• Factors contributing to the loss of battery capacity of the notebook
• Recommended care for the notebook battery
• The original battery is charged slowly, the spare battery is charged normally
• Tips for conserving battery power the notebook
  

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A lithium-ion battery 6 cell takes between 2.5 to 3 hours to fully charge, to a maximum voltage with the system off. After the battery is fully charged, the flow of current to the battery thanks to an integrated protection circuit (charge control) stops. The protective circuit prevents the battery to charge or discharge beyond safe limits.

Although the protective circuit uses a small amount of battery power to operate, the rate of self – discharge of lithium-ion battery is a fraction of the rate of nickel rechargeable batteries. Some factors that increase the rate of self – discharge of lithium ions, and to be avoided are described in section What is the battery capacity? Of this document. Improve life cycle of HP Laptop battery

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The life cycle of the battery is the total number of cycles of loading and unloading (Figure 1) a battery yields before it becomes unable to store enough energy. It is difficult to estimate the life cycle of a battery of ion rechargeable lithium as it is affected by temperature average battery performance and its energy discharge rate.

Basically, the higher temperatures and discharge rates higher energy reduces the cycle life of the battery. The operating temperature of the battery depends on the air temperature as well as the heat generated by the equipment itself and its immediate surroundings, such as an expansion base. The rate of energy discharge (drainage) depends on the type of applications running on the notebook and its power management settings.

For example, applications running resource-intensive equipment, such as CAD, games and DVD movies, download battery more quickly and reduces their life cycle than when word processing applications run. Improve life cycle of HP Laptop battery

A cycle for a rechargeable lithium-ion battery is the cumulative amount of discharge approximately equal to its full charge capacity. For example, 10 events with a depth of discharge of 10% or 2 events with a depth of discharge of 50% represent a cycle.

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The battery capacity is expressed in ampere-hours (Ah). The battery power expressed in watt-hours (Wh) is the product of the battery capacity (Ah) and the battery voltage (V). The voltage range operation of a lithium-ion battery remains relatively constant throughout life, but its capacity begins to decrease in a linear mode as soon as it starts. new batteries are classified by their rated capacity.

With the passage of time, the actual battery capacity decreases due to electrochemical deficiencies within each cell. This loss of capacity (aging) is irreversible; It can not be restored by the charging and discharging cycle of the battery. Gradually, it decreases the active material available within each cell to store a charge electrochemically. Consequently, the user experiences a reduction in the use of computer time.

A practical way to express the actual capacity of a battery over time is called full charge capacity (FCC). The FCC is expressed as a percentage of the initial nominal capacity of the battery. Both the typical battery discharge as the user profile influence the FCC. With an incidence of normal discharge, the lithium – ion batteries have a lifespan of between 300 and 500 cycles. With moderate use, it is estimated that the lithium ions provide about 80% of its nominal capacity after 300 cycles or about one year of use (Figure 2). This estimate includes users who typically use charge the battery completely every working day to run applications at low average power (word processing, email and spreadsheets) connected wired or wirelessly. Improve life cycle of HP Laptop battery

The total cargo capacity with moderate use is about 80% after 300 cycles.

HP offers a 12 month warranty for lithium – ion batteries . The warranty period is based on the expectation that the battery will provide 80% of its initial capacity after 300 cycles with factors of low load to moderate. The factors higher load can cause a battery to reach 80% of initial capacity in less than 12 months the warranty period. The lithium – ion batteries will continue to operate below the threshold of 80% capacity.However, capacity (time of use) between charges continue to decline.

The following table summarizes FCC projections after one year based on 2 user profiles and different load factors. The first profile is for a roaming user to download and completely charge the battery almost every working day (300 cycles per year) in a normal environment. The second profile is for a stationary user who only discharge the battery once a week in an atmosphere of high temperatures, such as an expansion base. As shown in the table, the additional heat generated by running applications that consume more energy or using an expansion base accelerates the loss of capacity. Improve life cycle of HP Laptop battery

Applications that require more energy can also reduce the life cycle of the battery up to 25%.

Calculate the time of battery use is further complicated by the inaccuracy of the system that monitors and reports the status of battery charge to the user. Some notebooks estimate the state of charge of the battery based on the manufacturer’s test specific product model with a particular configuration. This method is inaccurate when another battery with a different state of charge is inserted, because charge status of each battery is calculated based on its history in the system.

To help users monitor and manage lithium ion notebooks HP Compaq provide accurate and instantaneous information on the state of charge through the Smart Battery technology. The Smart Battery technology HP is based on the Smart Battery System system (SBS), created by leading battery manufacturers in 1995 to promote a standard in the industry rechargeable battery technology. The SBS standard provides a smart battery that maintains and reports its own state, and thus provides users with accurate information, whether they use different batteries in the same notebook or the same battery in different teams. Improve life cycle of HP Laptop battery

Downloads and brief and repeated recharging produce increased discrepancy between the state of charge of the battery and meter readings power.Periodically, the battery needs to be calibrated to “remember” its usable capacity, and thus synchronize their status loaded with energy meter. the calibration process maximizes usage time of the notebook, giving the user an accurate calculation of the remaining battery charge.Calibration also prevents data loss that can occur during hibernation if there is enough power available to complete critical operations of disk storage.

Smart batteries calibrate their FCC each time you go through a full cycle of loading and unloading, whether recharge in the notebook or in a separate charger. Calibrating the notebook is less convenient because it can take up to 4 hours, but can give more accurate results than using a separate charger.

Calibration results using the notebook are more accurate because the battery returns to “learn” its FCC while passing a real load factor. In a separate charger, the battery is discharged using a fixed factor. If the fixed load factor is less than the factor that usually experiences the notebook, the battery capacity can be recognized greater than its actual capacity. In other words, it is possible that the newly calibrated battery may not provide usage time predicted by the Power Meter if it underwent a major factor that used to calibrate the battery charge.

The accuracy of today’s Smart Battery enables precise calibration when the battery is discharged to 5% of its remaining capacity. Consequently, the user can set the battery alarm at 5% of the remaining capacity for the battery gauge intelligent capacity during normal use. Improve life cycle of HP Laptop battery

The user simply has to discharge the battery periodically until it receives the alarm capacity of 5%. The need to carry out this process can vary by individual use. In general, a lithium-ion battery must be calibrated at least once every 3 months. A battery that is rarely discharged fully should be calibrated about once a month.

By following the recommendations cell battery suppliers and best practices, the notebook continues not charging once the battery is fully charged to 100%. Once the battery is 100% charged, the charging function is activated interrupt and prevents the battery continue charging. The battery does not disable the function of interrupting the load until the charging indicator drops below 94%. Once the charging indicator drops below 94%, the charging function is activated and the battery starts charging with the AC adapter connected to the notebook. If the AC adapter is disconnected between the levels of 94% to 100%, the charge function is not activated and no longer notebook battery charge. Improve life cycle of HP Laptop battery

After reading the information presented in this document, you should know that the conditions listed below have a negative impact on the usage time and battery life.

No. Lithium ion batteries are more efficient than nickel rechargeable batteries and go through a training process during manufacture. They do not require an initial charge before use.

You can manually change the power consumption of your notebook to conserve battery power.

• Reduce the brightness of the screen as possible. Use the Fn and F7 or F8 keys to adjust the brightness.
• Disconnect peripherals when not in use. The external devices such as hard drives, CD-ROMs, Zip drives, PC cards and other peripherals spend the battery power even when not in use. Always unplug when finished using them.
• Reduce the processor speed. The faster your computer, you work faster spends the energy supplied. By reducing the processor speed, you can extend the battery charge. Methods to reduce processor speed vary by model. The manual instructions must bring your team to do so.
• Turn off the wireless button when not in use. If your notebook has that button, press it so that the light goes out .
• Check for programs running in the background. Some programs automatically install a utility quick start and run in the background when the computer starts. It can reduce energy requirements if regularly finds and removes unnecessary programs. Improve life cycle of HP Laptop battery