What Type of Lithium Cell is Used in Laptops ?
2009-11-02 10:15:39
Now this brings us to battery cells and our original question from the reader. Lithium based battery cells are good but there are a variety of lithium based battery cells. For example the lithium based cell identified as 18650 is one of the most common battery cell on the market for laptops. 18650 is manufactured by many manufacturers including many private branded companies to public companies like LG, Sony, Sanyo, Samsung, and Panasonic.
18650 is a 3.6V cylindrical Li-Ion cell. 18650 has no memory effect (distinguish between digital memory effect) and longer storage life than NiMH battery cells. 18650 is light weight and has a high energy density. It is in effect perfect for building batteries for laptop and other portable power devices.
The additional technical specifications for the 18650 battery cell include:
· Nominal Voltage Average 3.7 V - the concept of nominal voltage is that voltage range exists depending on the number of cells in the battery.
· Nominal Capacity - 2200 mAh (above 2200 the stability of lithium based cells is called into question)
· Max. Charging Current - 2.4 Amps Max.
· Max. Discharging Current - 4.6 Amps max.
· Dimensions (DxH) 18.3 mm (Max 18.4) x 64.9 mm (Max 65.1)
· Weight 46.5 g (1.64 oz)
· Internal Impedance Internal Impedance: less or equal to 90 ohms
· Cycle Performance is 80% of initial capacity at 300 cycles
Now as stated above the reader asked how many cells were in the Toshiba Satellite M105-S3041 Laptop Battery? The battery is rated at 10.8 volts and a capacity of 8800 mAh.
As I mentioned above the nominal voltage average is 3.7V. Some manufacturers may use 3.6V and some may use 3.7V. In the case of a laptop battery with 10.8V the nominal voltage rating used is 3.6V. Thus if we divide 10.8V by 3.6V we get 3. Thus 3 cells in a series. We also know that the batteries capacity is 8800 mAh. We know the nominal capacity is 2200 mAh. Therefore if we divide 8800 mAh by 2200 mAh then we get 4 in parallel.
Therefore we have: 3 cells in series multiplied by 4 cells in parallel equals 12 cells in total.
18650 is a 3.6V cylindrical Li-Ion cell. 18650 has no memory effect (distinguish between digital memory effect) and longer storage life than NiMH battery cells. 18650 is light weight and has a high energy density. It is in effect perfect for building batteries for laptop and other portable power devices.
The additional technical specifications for the 18650 battery cell include:
· Nominal Voltage Average 3.7 V - the concept of nominal voltage is that voltage range exists depending on the number of cells in the battery.
· Nominal Capacity - 2200 mAh (above 2200 the stability of lithium based cells is called into question)
· Max. Charging Current - 2.4 Amps Max.
· Max. Discharging Current - 4.6 Amps max.
· Dimensions (DxH) 18.3 mm (Max 18.4) x 64.9 mm (Max 65.1)
· Weight 46.5 g (1.64 oz)
· Internal Impedance Internal Impedance: less or equal to 90 ohms
· Cycle Performance is 80% of initial capacity at 300 cycles
Now as stated above the reader asked how many cells were in the Toshiba Satellite M105-S3041 Laptop Battery? The battery is rated at 10.8 volts and a capacity of 8800 mAh.
As I mentioned above the nominal voltage average is 3.7V. Some manufacturers may use 3.6V and some may use 3.7V. In the case of a laptop battery with 10.8V the nominal voltage rating used is 3.6V. Thus if we divide 10.8V by 3.6V we get 3. Thus 3 cells in a series. We also know that the batteries capacity is 8800 mAh. We know the nominal capacity is 2200 mAh. Therefore if we divide 8800 mAh by 2200 mAh then we get 4 in parallel.
Therefore we have: 3 cells in series multiplied by 4 cells in parallel equals 12 cells in total.
