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Home Articles How Are Laptop Batteries Rated?
Articles - How Are Laptop Batteries Rated?
There are two ratings on a battery, Voltage (V) and Milliamp-hours (mAh). Voltage is the rate at which energy is drawn from a battery. Milliamp-hours represents the capacity of the battery.
  • Here are some questions that might pop-up in your mind regarding your Laptop battery and answers to them:

Q: What if the Milliamp-Hour (mAh) rating is different to my original battery?

A: The milliamp-hour rating represents the capacity of the battery. The capacity is affected by the number of batteries in the battery pack. The capacity is increased by linking the cells in parallel. If the mAh rating is higher than the original battery, then the replacement battery will run for a longer time, if the rating is lower then the replacement battery will run for a shorter time.

Q: Can I use a battery which has a different voltage rating than my original battery?

A: No, the voltage rating has to match that of the original battery or as recommended by the manufacturer.

Q: Can I upgrade my Laptop Battery to a new chemistry?

A: Different battery chemistries cannot be substituted unless the laptop has been pre-configured in the factory to accept more than one type of rechargeable battery. Refer to your laptop laptop manual to find out which laptop rechargeable battery types your device accepts.

Q: What do the LED lights on the battery do?

A: The little LED lights on the laptop battery is like a fuel gauge of that battery. It tells the relative amount of capacity in the battery. One LED light would mean that the battery is nearly empty when all the LEDs are lit then it would mean the battery has full capacity.

Q: What is a "SMART" Battery?

A: Smart batteries have internal circuit boards with smart chips which allow them to communicate with the notebook and monitor battery performance, output voltage and temperature. Smart batteries will give the computer much more accurate "fuel gauge" capabilities to determine how much battery running time is left before the next recharge is required.

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