Info: Understanding Cellular Batteries

Types of Batteries

NEXTEL BATTERIES
BREAK DOWN.

Also, system types
What is CDMA, TDMA, GSM, AMPS system for cellular? Read alfter batteries information. Or click here

What is mAh?
Milli-Amp-Hour. This is a common battery rating of battery. A higher mAh rating implies longer standby/talk time.
The general compare list for cell capacity and stand by time/operation time for Cell phone.
System stand by / operation time Cell Capacity
600 mAh 900 mAh 1200 mAh 1350 mAh 2700 mAh 3400 mAh
AMPS/CDMA stand by time(35mAh/hour) 17 hr 25.7 hr 34 hr 38.5 hr 77.1 hr 97.1 hr
operation time(350mAh/hour) 1,7 hr 2.57 hr 3.4 hr 3.8 hr 7.7 hr 9.7 hr
GSM/TDMA stand by time(35mAh/hour) 100 hr 150 hr 200 hr 225 hr 450 hr 566.6 hr
operation time(350mAh/hour) 2 hr 3 hr 4 hr 4.5 hr 9 hr 11.3 hr

What do all these NiCd, NiMh and Lithium Ion mean?
NiCd is Nickel Cadmium, NiMh is Nickel Metal Hydride. They are the 3 main kinds of batteries in the market these days. Metal Cadmium is the most common type of battery cell, and usually the cheapest. However, NiCd batteries have "memory effect", which require them to be fully-discharged before recharging. NiMh batteries, on the other hand, have negligible "memory effect", and are more environmentally friendly. They have shorter life cycles in general. However, lithium ion batteries are gaining in popularity due to their slim dimensions, high energy density, and reasonably long battery life. These qualities have made them a favorite among cellular phone owners. Lithium Ion battery cell has no "memory effect".

What is memory effect?
If you keep charging a battery over and over when it still has some power stored, the battery will eventually build a "memory" and will not be able to completely drain and charge 100%. If this keeps up over time, you may lose over 50% of your battery's service life and capacity, within the first year.
Condition/discharge battery by leaving on the phone until it shuts off
Your phone, laptop or camcorder eventually shuts off because the battery's output voltage has dropped too low to keep the phone powered on. There is still about 3-7% of the total stored energy left over inside the battery. It is this remaining energy that must be drained out regularly, to keep your batteries lasting longer, providing more using time. MORE ABOUT MEMORY

Car Plug In Charger/DC charger
Car plug in charger is what someone may refer to as cigarette lighter charger or plug in charger. it plugs into your vehicle's cigarette receptacle and the other end plugs into your phone, laptop or camcorder providing power as it charges your battery. Unfortunately most of the car chargers available in the States do not have trickle charging built-in.

Typical life of a NiMh /Lithium Ion battery
A typical OEM NiMh battery is good for approximately 500 charges. Therefore almost all NiMh batteries do not carry a 18 month warranty. Lithium Ion battery has smart memory for charges. We warranty 18 months for any Lithium ion battery.

What is CDMA, TDMA, GSM, AMPS system for cellular?
CDMA - Code Division Multiple Access: A spread-spectrum approach to digital transmission. With CDMA, each conversation is digitized and then tagged with a code. The mobile phone is then introduced to decipher only a particular code to choose the right conversation off the air.
TDMA - Time Division Multiple Access: A method of digital wireless communications transmission allowing a large number of users to access a signal by allocating unique time slots to each user within each channel.
GSM - Group Special Mobile or Global Standard For Mobile: A time-division based standard for the digital wireless transmissions. It is most prevalently used in Europe and the Middle East.
N-AMPS - Narrow-Bandwidth Advanced Mobile Phone Service: The N-AMPS technology is a modified version of
AMPS - designed to use a narrow bandwidth.
AMPS - Advanced Mobile Phone Service: The AMPS standard has been the foundation for the industry in the United States, although it has been slightly modified in recent years.