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The laptop is no different. The voltage on your battery "10.8V" is the "nameplate" voltage, some average voltage that your battery delivers over full discharge cycle. The value of "10.8" indicates that this is a battery of 3 Li-Ion cells in series, giving their standard "nameplate" voltage of 3.6V per cell.
What voltage difference could indicate that some cells are not as good as others? The first thing you should worry about the voltage of the cells: If one of them exceeds the max allowed (or recommended) charging voltage, which is usually 4.2V, then this cell will degrade more.
A nickel-cadmium cell is used from 1.25 - 1.1 V and so on. You can use these voltage ranges to approximately get the battery percentage from 100 - 0 %. 3.5 Volts is not the minimum voltage for Li-Ion or Li-Po batteries. I can use the battery in 2.5 Volts.
Voltage readings will vary and are greatly affected and dependent on whether the battery is being charged, discharged or in storage (rest or “open cell” voltage). There are two terms for voltage readings: Open cell voltage. Charge Voltage: When a battery is charged the plates will polarize and develop a resistance to the charge (surface charge).
For different battery chemistries, the voltage levels are different. For example, some types of lead-acid batteries are used from 13.2 - 10.5 V. A nickel-cadmium cell is used from 1.25 - 1.1 V and so on. You can use these voltage ranges to approximately get the battery percentage from 100 - 0 %.
There are two terms for voltage readings: Open cell voltage. Charge Voltage: When a battery is charged the plates will polarize and develop a resistance to the charge (surface charge). This resistance will add to the battery voltage and therefore using this voltage reading will not reflect the true state of charge.
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You can get a very rough estimate of remaining charge looking at a battery''s voltage at a known, constant discharge current by checking the discharge curves in the battery''s documentation and implementing a …
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