A battery has 2 key characteristics, the voltage expressed in Volts (V) and the amount of electricity expressed in Ampere-hour (Ah) or milliamp-hour (mAh).
The characteristic energy of a battery is calculated as follows: Voltage (V) x amount of electricity (Ah) = Energy (Wh)
Example: 19.5V x 4400mAh = 85.8 Wh
We can then speak of the capacity of energy instead of power.
What type of battery is used to make self a laptop?
All batteries sold today with the original notebooks are made in Li-Ion, that is to say that it is a type of lithium batteries with the material (lithium) is the ionic state.
These batteries are expensive because lithium is an expensive material and their main advantage is the amount of energy that may have put it into a small volume.
Key Benefits
* No memory effect or effects very low memory (using principle prematurely battery that prevents it from charging to 100% due to poor maintenance of the battery).
* Excellent value amount of energy / volume due to the physical properties of lithium.
* Self-discharge (natural discharge when the battery is unused) negligible which allows not to worry about storage.
* Secure from the first lithium batteries (in the metallic state) through an electronic circuit integrated inside (in the plastic mold).
Main disadvantages
* Price, because of the complexity of manufacturing and material (lithium).
* Deterioration important when you discharge the battery below 10% (up to 20% of capacity lost in one fell swoop!).
* Charging current limited because of their internal technology and the dangers of lithium, so the burden may seem slow!
* Low resistance to high temperatures: it is advisable to use a temperature of 20-25 ° C, but must not exceed 40 ° C under penalty of really damaging. It should never reach high temperatures of around 75-80 ° C under penalty of explosion (not a joke!).
* Like all batteries they will wear out over time and nothing can reverse the process.
CAUTION:
The batteries of any kind (batteries, rechargeable batteries, lead acid batteries & lithium …) are highly polluting and should never be thrown in the garbage. They must be completely recycled (all hypermarkets, Bricomarché and rubbish bins have skimmers).
You should never try to repair a battery by opening it to burn or severely intoxicated.
Increase the lifespan of the battery of laptop
As mentioned previously, change the battery is a real investment of around one hundred euros in general, so there are some concepts to know and implement to extend the maximum duration of life.
These precautions are:
* First buy a battery when the first thing to look (after his power in W) is the date of manufacture: actually as announced earlier battery loses its capacity from its manufacture, so the date is more recent plus the battery capacity is close to that declared on the label.