A battery has 2 main characteristics, the voltage expressed in Volts (V) and the amount of electricity expressed in Ampere-hours (Ah) or milliamp-hours (mAh). The energy characteristic of a battery is calculated as follows: Voltage (V) x amount of electricity (Ah) = Energy (Wh)
Example: 19.5 x 4400mAh V = 85.8 Wh
We can then speak of capacity for energy instead of power.
What type of battery is used to empower a laptop?
All batteries sold today with the original laptops were made in technology Li-Ion, ie that it is a type of battery lithium whose materials (lithium) is the ionic state.
These batteries are expensive because the lithium material is expensive and their main advantage is the amount of energy that have little to fit in a small volume.
Key Benefits
- No memory effect and very low memory (principle prematurely using the battery will not recharge to 100% due to poor maintenance of the battery.)
- Excellent amount of energy / volume due to physical properties of lithium.
- Self-discharge (natural discharge when the battery is unused) negligible which does not worry about storage.
- Secure compared to the first lithium batteries (with the metallic state) through an electronic circuit integrated within (in the plastic mold).
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