I have seen different types of battery cells like 6, 9 and even 12 cells, what are they?

This number indicates the number of individual cells used to make up the laptop’s battery. The more cells, the greater the battery capacity. Typically, the battery with the fewest number of cells is the standard battery that came with your laptop. The 9 or 12 cell batteries are higher capacity extended batteries that will give you much longer run time on a single charge.

Before you buy a battery with more cells, you should weigh the benefits against the added size and weight, especially if you carry your laptop with you all day.

Is the grade of battery cells important?

In general, a laptop battery will provide between 400 and 800 cycles of life, depending on usage and the quality of the battery. Lower quality or poorly manufactured batteries will provide fewer cycles and a shorter overall life.

• Highest quality batteries (grade A cells) – 12-18 months
• Medium quality batteries (grade B batteries) – 10-15 months
• Low quality batteries (grade C cells) – 5-10 months

How long will the new battery power my laptop?

Actual battery runtime depends on the power demands of your computer, such as the applications you’re running and your laptop’s settings. Our replacement batteries will last as long as or longer than the original battery that came with your laptop when it was new (at the same capacity). Generally, a standard 4400 mAh will last between 45 and 90 minutes. You can calculate how long a higher capacity battery will last based on the mAh difference. A 7200 mAh battery will give you 64% more runtime and a 10400 mAh will give you 136% more runtime than a 4400 mAh on a single charge.

How long does a laptop battery last? When should I consider replacing mine?

All rechargeable batteries wear out with time and use. As time and cumulative usage increase, performance will degrade. For the typical user, a noticeable reduction in run time will generally be seen after 18-24 months. For an advanced user, the reduction in run time can generally be experienced before 18 months. We recommend buying a new laptop battery when runtime doesn’t meet your needs.

What are watt-hours, volts, and milliampere-hours?

Each battery has three ratings which are watt-hours, volts, and milliampere-hours.

Watt hours (wHr) It is a unit of energy equal to the work done by one watt acting for one hour and equivalent to 3,600 joules. The wHr is a calculation of voltage and mAh.

Milliamps (mAh) It is a unit of measurement of electrical power over time. It represents the total amount of energy stored in your battery. The mAh rating is also a measure of the number of hours a battery can last. The higher the amp hour rating of a battery, the longer the run time of the battery will be. It is not uncommon for some of our batteries to have higher or lower amperage ratings. This will not cause any incompatibility.

Voltage (V) is the amount of electricity delivered to your computer. The amount of power from your wall outlet is more than what your laptop needs to run. Therefore, a power adapter contains a box-like bar that will drop power and reduce the voltage rating. Each computer manufacturer designs their computers for the appropriate voltage requirement. Your battery pack will then be designed to match the voltage of the AC adapter. Laptop battery packs are made up of multiple battery cells that are connected in series. While the high capacity battery voltage may not be identical to the original battery, the voltages should be within a reasonable range. Any spare laptop battery should always be within +/- 1V. Anything above that range can cause incompatibilities.

Tips: The above content comes from https://en.laptopbatteryshop.nl/help/battery-faqs.htm.