Most of today's laptop computers are powered with Lithium-ion batteries. Laptop batteries is different from other types of batteries in that they provide a relatively short service life and are expensive to replace.
In good conditions, Lithium-ion provides 300 to 500 discharge/charge cycles or 2 to 3 years of service from the time the battery leaves the production line. The capacity loss occurs through increased internal resistance caused by cell oxidation. Eventually the resistance reaches a point where the battery can no longer deliver the needed energy although the energy may still be present in the battery. There are no remedies to restore the capacity when worn out. Heating the battery will momentarily improve the performance.
Laptop batteries can be repaired but such work only makes economical sense for smaller operators. The success rate varies with battery type.
Recycle the Used Batteries
NiCad, NiMH and Li-Ion batteries should be recycled. Be environmentally conscious - do NOT throw these batteries in the trash. If you don't know where your local recycling facility is, call the Portable Rechargeable Battery Association at 1-800-822-8837. They will provide you with the address of the recycling center nearest to you. or visit Call2Recycle, the Rechargeable Battery Recycling Corporation (RBRC), they can help you recycle your used portable rechargeable batteries and old cell phones..