| When looking at the mAh on a laptop battery, | | | | of several battery cells that are wired together in |
| what does that mean? I have a 4400mAh | | | | series. By combining the cells in this fashion, higher |
| battery and i'm trying to replace it with another | | | | volumes of energy can be delivered to your |
| battery. I find batteries that have my series # | | | | laptop computer. For laptop computers, each |
| but it also has other series numbers. should i look | | | | battery cell has a voltage rating of 3.6 or 3.7 |
| out for the mAh? | | | | volts. (3.6V & 3.7V are used interchangeably |
| About laptop battery mAh rating: | | | | and refer to the same amount of voltage.) |
| MAh (Milliamperes) represents the amount of | | | | Cells Voltage/Cell Formula Nominal Voltage |
| stored energy in your battery. 1000 Milliamperes = | | | | 1 cell 3.6V or 3.7V 1 cell x 3.6 or |
| 1 Ampere. The more mAh capacity - the longer | | | | 3.7V 3.6V or 3.7V |
| your battery will last. 4400 mAh means that the | | | | 2 cells 3.6V or 3.7V 2 cells x 3.6V or |
| battery can produce 4400 mA for one hour. | | | | 3.7V 7.2V or 7.4V |
| Similarly, 7200 mAh means 7200 mA for one | | | | 3 cells 3.6V or 3.7V 3 cells x 3.6V or |
| hour. | | | | 3.7V 10.8V or 11.1V |
| In reality, these specifications are for a eight-hour | | | | 4 cells 3.6V or 3.7V 4 cells x 3.6V or |
| rating, meaning that the 4400 mAh battery can | | | | 3.7V 14.4V or 14.8VmAH stands for milli |
| produce 550 mA for eight hours but, | | | | Ampere-Hours. WH stands for watt-hours. Both |
| comparatively, you can just ratio the ratings, so | | | | are a measure of the total amount of energy |
| the 7200 mAh battery will last 60% longer than | | | | stored in a battery. So, the higher the better if |
| the 4400 mAh battery | | | | you want the laptop to work for a long time on |
| Voltage in a battery refers to the volume of | | | | the battery's power. The important thing though |
| electricity that is delivered to your computer. The | | | | is the voltage. You can replace a battery of low |
| amount of energy that comes from your wall | | | | mAH or WH with one of higher rating, but if the |
| outlet is far in excess of what you need to | | | | voltages don't match, at best your laptop will not |
| operate the tiny circuits of a computer. Hence | | | | power on, and at worst, it will smoke and burn |
| your power adapter contains a bar like box that | | | | when you power it on. |
| decreases the energy to a much lower voltage | | | | Several batteries from mambate.us have higher |
| rating. Each computer manufacturer designs their | | | | mAh ratings than your original battery brand.This |
| computers for the appropriate voltage | | | | does not mean that the battery is not the |
| requirement. Your battery pack will then be | | | | correct replacement, but rather it is a longer |
| engineered to match the voltage of the power | | | | lasting battery. |
| AC adapter. Laptop battery packs are composed | | | | View more at cheap laptop batteries. |