Posts tagged Many
I am bringing way too many electronics.
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Sent from iPhone.
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"… Software Freedom Day is a global, grassroots effort to tell people about the virtues and availability of Free and Open Source Software …"
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I’ve always enjoyed browsing the flickr "What’s in my bag" groups, so finally after several years, here’s my contribution.
How Many Cells Are In A Apple A1080 Laptop Battery
Question from a reader: “How many cells are in the APPLE A1080 Laptop Battery? The battery is for a APPLE A1080 and its technical ratings are Li-ion, 4400.00mAh, 14.40V.”
The question from the reader is a great question for it gets to the heart of battery manufacturing and begins to unravel the power of a battery. The answer is simply: 8 cells. But what does the answer mean and how does the number of cells relate to the overall value of a battery? Let’s find out…
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: 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 APPLE A1080 Laptop Battery? The battery is rated at 14.4 volts and a capacity of 4400 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 14.4V the nominal voltage rating used is 3.6V. Thus if we divide 14.4V by 3.6V we get 4. Thus 4 cells in a series. We also know that the batteries capacity is 4400 mAh. We know the nominal capacity is 2200 mAh. Therefore if we divide 4400 mAh by 2200 mAh then we get 2 in parallel.
Therefore we have 4 cells in series X 2 cells in parallel equals 8 cells in total.
We strive to make you Laptop Battery purchases easy. Since we understand that finding the right batteries for your needs can be overwhelming and confusing at times we developed a Laptop Battery finder tool to help find the right size for the make and model of your equipment. We also offer educational articles and tips to help you conserve your batteries and understand common problems. By us providing education you are able to make the right purchasing decisions as well as provide proper care for all of your electronics.