Mobile Phone Batteries. What Are Your Options?
by: Will Koh
There are a range of different mobile phone, video camera/camcorder and digital camera batteries out there with varying capacities and battery chemistry. We will explain what the differences are for each battery chemistry and try to clear up the jargon used on the labels of mobile phone batteries. There have been several developments in battery technology and below, we will outline each battery chemistry's features, pros and cons and their applications to mobile phones today.
"Memory Effect" in Batteries
Memory affect refers to the need for certain batteries to be "serviced" by regularly discharging the battery completely before recharging. Ni-Cad batteries are the main type of battery chemistry that requires this cycling and newer types of batteries such as Li-Ion and NiMH do not suffer from memory affect.
Battery Capacity Ratings
A battery capacity rating refers to the load or current that can be placed on a specific battery type. The battery capacity rating is usually measured in milliampres (mAH)
Ni-Cad (Nickel Cadmium) Batteries
In the past, majority of rechargable batteries used in portable devices such as mobile phones, camcorders and cordless phones used Nickel Cadmium as the main battery chemistry. Although this type of battery has drawbacks such as the "memory effect", it is still one of the most commonly used battery in cordless phones, CD players, Radios and other portable devices due to their low cost per battery cycle. The use of these batteries in mobile phones today is rare due to their memory effect problems and inconveniences. Despite these obvious drawbacks, it also has environmental implications due to the metal used to manufacture these batteries and are fast becoming replaced by Nickel Metal Hydride Batteries.
NiMH (Nickel Metal Hydride) Batteries
NiMH batteries are one of the growing battery chemistries today mainly due to the fact that it does not suffer from memory effects like a NiCad battery does. Because of this advantage, they are mainly used in Laptops and mobile phones and sometimes also as a battery source for video cameras and digital cameras. This is an important and main feature that makes NiMH batteries attractive as consumers are not burdened by having to "service" their batteries by discharging it fully before recharging. They also have a higher capacity rating compared to Ni-Cad (approx 30% higher) and Alkaline batteries, however their main drawback is that these batteries self-discharge over a short period of time which makes them not suitable for storage.
Li-Ion (Lithium-Ion) Batteries
These batteries are quite new to the market and have the lowest discharge rating compared to Ni-Cad and NiMH batteries. They do not suffer from memory effect and is one of the most commonly used type of batteries in mobile phones today. They have an excellent power to weight ratio which makes them highly attractive to portable devices such as mobile phones, video cameras and digital cameras. All our mobile phone batteries we offer are Li-Ion as they are superior compared to other battery alternatives.
This is relatively new and we are beginning to see more of these batteries appear in mobile phones today. They are considered as the best battery chemistry today for mobile devices due to their high capacity and low weight. Li-Polymer batteries do not suffer from “memory loss.”
The Real Jesus:
Who is the Real Jesus?
Ever since the dawn of modern rationalism, skeptics have sought to use textual criticism, archaeology and historical reconstructions to uncover the "historical Jesus" -- a wise teacher who said many wonderful things, but fulfilled no prophecies, performed no miracles and certainly did not rise from the dead in triumph over sin.
Over the past 100 years, however, startling discoveries in biblical archaeology and scholarship have all but vanquished the faulty assumptions of these doubting modernists. Regretably, these discoveries have often been ignored by the skeptics as well as by the popular media. As a result, the liberal view still holds sway in universities and impacts the culture and even much of the church.
This presentation explodes the myths of these critics and the movies, books and television programs that have popularized their views.
Presented in ten parts -- perfect for individual, family and classroom study -- viewers will be challenged to go deeper in their knowledge of Christ in order to be able to defend their faith and present the truth to a skeptical modern world – that the Jesus of the Gospels is the Jesus of history -- "the same yesterday, today and forever" (Hebrews 13:8). He is the real Jesus.
Speakers include: George Grant, Ted Baehr, Stephen Mansfield, Raymond Ortlund, Phil Kayser, David Lutzweiler, Jay Grimstead, J.P. Holding, and Eric Holmberg.
Ten parts, over two hours of instruction!
Running Time: 130 minutes
|The Beast of Revelation: IDENTIFIED
Who is the dreaded beast of Revelation? Now at last, a plausible candidate for this personification of evil incarnate has been identified (or re-identified). Ken Gentry's insightful analysis of scripture and history is likely to revolutionize your understanding of the book of Revelation -- and even more importantly -- amplify and energize your entire Christian worldview!
Historical footage and other graphics are used to illustrate the lecture Dr. Gentry presented at the 1999 Ligonier Conference in Orlando, Florida. It is followed by a one-hour question and answer session addressing the key concerns and objections typically raised in response to his position. This presentation also features an introduction that touches on not only the confusion and controversy surrounding this issue -- but just why it may well be one of the most significant issues facing the Church today.
Ideal for group meetings, personal Bible study -- for anyone who wants to understand the historical context of John's famous letter "... to the seven churches which are in Asia." (Revelation 1:4)
(Available in DVD only)
INCLUDES A FREE
Sixteen Christian leaders and scholars answer some of the most common questions and misperceptions related to this volatile issue:
Download the free
Perfect for group instruction as well as personal
Bible study. Speakers include: George Grant, Howard Phillips,
R.C. Sproul Jr., Ken Gentry, Gary DeMar, Jay Grimstead, R.J. Rushdoony,
Steven Schlissel, Andrew Sandlin, Eric Holmberg, and more!
Ten parts, over four hours of instruction!
Watch over 60 streaming videos from God's Law and Society at:
|Amazing Grace: The History and Theology of Calvinism
Over four hours of instruction!
Just what is “Calvinism?” Does this teaching make man a deterministic robot and God the author of sin? What about free will? If the church accepts Calvinism, won’t evangelism be stifled, perhaps even extinguished? How can we balance God’s sovereignty and man’s responsibility? What are the differences between historic Calvinism and hyper-Calvinism? Why did men like Augustine, Luther, Calvin, Spurgeon, Whitefield, Edwards and a host of renowned Protestant evangelists embrace the teaching of predestination and election and deny free will theology?
This is the first video documentary that answers these and other related questions. Hosted by Eric Holmberg, this fascinating three-part, four-hour presentation is detailed enough so as to not gloss over the controversy. At the same time, it is broken up into ten “Sunday-school-sized” sections to make the rich content manageable and accessible for the average viewer.
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