How to know no of cells of a Li-ion battery pack?

We assure our refilled battery work at 100% close to an original battery! Below is the price for standard cells, 2200/4400/6600mAH. For others price please mail for enquiry.

• 3 cells 10.8V, 11.1V 1300mAH-2200mAH, RM140
• 4 cells 14.4V, 14.8V 1300mAH-2200mAH, RM140
• 6 cells 7.4V, 10.8V, 11.1V 2600-4800mAH (up to 6550 for 7.4V model), RM180
• 8 cells 14.4V, 14.8V 2600-4800mAH, RM220
• 9 cells 10.8V, 11.1V) 4800mAH-6550mAH, RM230

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For those who are interested, one Li-ion cell usually able to carry about 3.6-3.7V1300mAH to 2600mAH. when two cells are combined to work parallel, this will double the capacity, i.e. it will result in higher capacity, but with the same voltage. Double the cells allow double the power the combination of cells can output.

To achieve higher voltage, the cells are connected in series. If you are curious, why they don't simply parallel up the cells to make a let say 3.6V, 12000mAH battery, instead they make of 10.8V, 4000mAH? First 12000mAH battery pack is extremely dangerous! If it able to discharge in 2C, there will be 24A continue. If there are a direct short occur inside cells due to manufacturing defection, there can be higher Ampere such as 100A, resulting in quickly vaporization of chemical inside the shorted cells and can result in explosion of a single cell. Whatever they do, I never see they make more than 3 cells in parallel , since the safety valve is not designed in handle this, otherwise it will tend to have liquid leak.

The second reason is the chip inside the notebook is unlikely to operate with 3.6-3.7V. In fact, a single cells tend to operate from 3V to 4.2V. If a chip inside notebook operate at cmos logic level interface, it is more likely to draw a 3.3V from a power source. 3V may be too low and can result in system stability issue, where as 4.2V is too high and can result in increasing power dissipation while this is unnecessary. Beside, if the processor is using let say 1.2V, it is extremely difficult to regulate a 1.2V with high current from a low voltage like 3.0V. The filter capacitor to regulated the power will become larger, this is absolutely undesirable in a notebook.