The Number of Cells in a Battery

One reader asked me on the number of cells a Toshiba Satellite M105-S3041 Laptop Battery has. The reader further said that the battery is for the specified Model of a Toshiba laptop and has10.8 volts 8800mAh technical ratings and is Lithium ion.

I find it very interesting as this is really something deeper. By dwelling on that question, we are about to untie the hidden facts of battery power. Anyway, there are a total of 12 cells in a battery. But we should not stop there as that is just actually the beginning. I will be discussing in this article the relation of the number of cells to the general worth of a battery.

How is power generated by a battery?

A battery changes chemical power into electrical power. By a series of procedures that happened before the electrical power was created, the batteries were able to produce electrochemical power. With the use of a charger, electricity is set up in the battery. Acting as a medium of thrusting the electrons, the charger helps to propel the electrons into the chemical lithium. This charging procedure entails embolism in order for the electrons to unite with the other molecules in the diminutive areas of the lithium amid the fossilized planes of the lithium. Basically, the electrons ionized the lithium which fills the crystal surfaces to the peak so that they are pushed into an electrical surge. Lithium is actually refilled through embolism although the ionization outcome is the definitive exhaustion of the responsive characteristics of the lithium.

Lithium is a good element for batteries because of its being an extremely responsive metal. There is an extremely elevated electrochemical capability in lithium.

The electrochemical capability in a number of lithium-based cells is 5 times more than the same-size lead-acid unit or cell and is 3 times more than an alkaline battery. Malleable and pliant, lithium can fit in rigid compositions, thus is ideal for tiny cell designs like laptops, cameras, PDAs and the like.

The Kind of Lithium Cell Utilized in a Laptop Computer

There is an array of lithium-based battery cells and which are of high-quality. Let us take the case of the 18650, a lithium-based cell battery that is recommended for laptops and is commercially known in the computer world. A lot of manufacturers are producing the 18650 battery even consisting of big businesses such as Sony, Panasonic, Sanyo, Samsung and LG.

The 18650 is a 3.6 tubular Lithium ion cell, does not have any memory result (differentiate amid the digital memory) and has a long-lasting lifespan compared with the NiMH battery cells. The former also has elevated force solidity and is not heavy. It is actually ideal for structuring the batteries for laptop computers and other movable power gadgets.

Following are the technical designs of a 18650 battery cell:

  • 3.7 volts average nominal voltage. This means that the range of the voltage relies on the battery’s number of cells.
  • A 2200 mAh nominal capacity. The solidity of a lithium-based cell battery is questionable if its nominal capacity is more than 2200 mAh.
  • An upper limit charging current of 2.4 Amps
  • An upper limit discharging current of 4.6 Amps
  • A dimension of 18.3 mm by 64.9 mm
  • A weight of 46.5 g
  • An internal impedance ratio of fewer or equivalent to 90 ohms
  • The cycle efficiency must be 80% of its original capability at 300 sets

As indicated by the reader, the Toshiba Satellite M105-S3041 Laptop battery’s rate is 10.8 volts with a capability of 8800mAh.

I mentioned above that 3.7 volts is the average nominal voltage. Some producers use 3.6 voltage while other manufacturers use 3.7. Laptop batteries that have 10.8 volts use 3.6 volts for its nominal voltage rating. So breaking up 10.8 volts by 3.6 volts will result in 3; therefore there are 3 cells in a chain. For an 8800mAh capacity, we divide it with the nominal capacity which is 2200 mAh. Hence, 8800 mAh divided by 2200 mAh will result to 4.

So for the above specifications of a Toshiba Laptop with a 10.8 volts and an 8800mAh rating, we have 3 cells in a chain. We then multiply it by 4 cells in parallel giving us a total of 12 cells.

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