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All India PT Mock Test (OMR Based) Across 20 Cities

will be conducted on 20th May, 2018. Click here for Test Schedule & Online admission.

Test Center List:

  1. Delhi
  2. Jammu
  3. Chandigarh
  4. Ahmedabad
  5. Bhopal
  6. Lucknow
  7. Allahabad
  8. Patna
  9. Ranchi
  10. Kolkata
  11. Bhubaneswar
  12. Raipur
  13. Jaipur
  14. Mumbai
  15. Pune
  16. Nagpur
  17. Hyderabad
  18. Chennai
  19. Coimbatore
  20. Bengaluru

Mobile Phone Batteries

Mobile Phone Batteries

Battery is the lifeblood of a mobile phone. All batteries contain one or morecells. A cell is the working chemical unit inside a battery. A cell has three main parts: apositive electrode(terminal), anegative electrode, and a liquid or solid separating them called theelectrolyte. There are four basic types of rechargeable battery used in mobile phones: 1. Nickel Cadmium (NiCd) Batteries Nickel Cadmium cell phone batteries are based on old technology. The chemicals used in NiCd batteries are not environmentally friendly, and the disposal of cadmium-rich waste is an increasing problem. They are the cheapest variety of phone batteries. Their affordablility helps to bring down the overall cost ofmobile phones. 2. Nickel Metal Hydride (NiMH) Batteries Nickel Metal Hydride (NiMH) batteries claim to be superior to NiCd because they dont contain cadmium. The cell phone batteries are made from non-toxic materials and are environmentally friendly. They also deliver a higher capacity in relation to their size and weight. 3. Lithium Ion (Li-Ion) Batteries This is the current and most popular technology for cell phone batteries. The only real drawback of Lithium Ioncell phone batteriesis that they are expensive. As such, they tend to be supplied with only top-of-the-line phones. Lithium Ion batteries are slightly lighter than NiMH batteries, but they also have a longer lifetime. A Lithium Ion battery may be damaged by extensive overcharging (continuously on acell phone chargerfor more than 24 hours). 4. Lithium Polymer (Li-Poly) Batteries Li-Poly Batteries are the newest and most advanced technology for cell phone batteries. Ultra-lightweight, they do not suffer from memory effect and will deliver up to 40% more battery capacity than a Nickel Metal Hydride (NiMH) of the same size.

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