There are three types of portable batteries restored the name of each of its components:
Nickel cadmium (NiCad) batteries are almost never seen. They have dismally low capacities (2000-3000 mAH) and contain heavy metals that harm the environment. Worst of all is the dreaded "memory effect". To recharge a NiCad battery before it is completely drained, the longevity of the battery is compromised. That is the memory effect.
Nickel Metal Hybrid (NiMH) batteries have twice the capacity of NiCad batteries (4000-6000 mAH) and are half as susceptible to the effects of memory. But these are increasingly rare.
Lithium Ion (Li-Ion) batteries are today's laptop battery standard. They have all the capacity of a NiMH battery, but zero memory effect and zero toxins. Bonus: Li-Ion batteries weigh half as much as NiMH batteries.
The purchase of a battery, the consumer has three options: used, refurbished or new.
Used portable batteries that are not refurbished will probably last you only 30 minutes to an hour before needing recharging.
Refurbished laptop batteries are available from most manufacturers and retailers of refurbished laptops. These batteries are renewed, recharged and tested. They are much better than plain old used batteries, but not as good as new.
New laptop batteries last a good couple of years - 600-800 recharges - provided they are properly cared for.
The extension of the battery
When you are using your laptop near a power source, use the A / C adapter. However, sometimes you will be forced to use your laptop without access to an outlet, the battery will run low. Here are three things you can do to extend the power in the rest of the battery:
First, if your laptop processor features a power saving mode, switch to energy saving mode. This will slow the laptop by up to 50%, doubling battery life for that period of time.
Second, turn off the suction power of foreign elements. The major power vampires in your laptop are the hard drive, CD and DVD, network devices, and any excessively bright screen settings.
Thirdly, you can double the battery capacity in general by installing a second battery. Your laptop must have a universal bay in order to do this. All you have to do is remove the CD-ROM or floppy drive and put the battery in place.
