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eBuyBatteries.com sells replacement Laptop Netbook Batteries, Digital Camera Batteries, Digital Camcorder Batteries, Power Tool Batteries, Digital Camera Camcorder Battery Chargers, Laptop Netbook AC DC Power Adapters, and Digital Camera Camcorder Power Supplies. We provide you brand new, high capacity, rechargeable batteries, wall and car rapid battery chargers, endurable power cords for laptops, netbooks, ultrabooks, digital cameras, and digital camcorders. All our batteries, battery chargers and power adapters come with 30 days money back guarantee and 1 year replacement warranty.


eBuyBatteries Product Knowledge

Battery Glossary

Ampere-Hour (Ah) Battery Battery Capacity Cell Charge
Cycle Cycle Life Discharge Deep Discharge High Capacity
Lithium-ion Memory Effect Multiple Cells NiCad NiMH
Open Circuit Self Discharge Shelf Life    
Battery
A device that transforms chemical energy into electric energy. The term is usually applied to a group of two or more electric cells connected together electrically. In common usage, the term "battery" is also applied to a single cell, such as a household battery. Most of our laptop notebook batteries, digital camera batteries and digital camcorder batteries are multiple cells.

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Cell
An electrochemical device, composed of positive and negative plates, separator, and electrolyte, which is capable of storing electrical energy. When encased in a container and fitted with terminals, it is the basic "building block" of a battery. All of our laptop notebook batteries, digital camera batteries, and digital camcorder batteries are new case and new cells, and we carry batteries made with brand new, high quality battery cells only. Every laptop notebook battery from us contains Japanese cells, such as Panasonic, Toshiba, etc. We don't sell used, refurbished batteries, or batteries with new cases and refurbished cells.

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Multiple Cells
A battery pack consists of multiple high-capacity battery cells inside. These high-quality NiCad, NiMH, and LiON cells are used to guarantee maximum capacity and service life.

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There are five types of rechargeable batteries commercially available: Lead acid, NiCad, NiMH, Lithium-ion, Polymer. The most popular rechargeable batteries are NiCad, NiMH and Lithium Ion in current consumer electronic industry, most of our laptop notebook batteries, digital camera batteries and digital camcorder batteries are Lithium-ion battery.


NiCad
Nickel Cadmium (NiCad) is the most popular and durable type of rechargeable battery. They are quick to charge, last approximately 1000 charge and discharge cycles, and work well in extreme temperature conditions. Unfortunately, NiCad batteries suffer from "memory effect" if they are not completely discharged each cycle. The memory effect reduces the overall capacity and run time of the battery.

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NiMH
Nickel Metal Hydride (NiMH) batteries do not suffer from the memory effect as the NiCad counterpart. Compared to a NiCad battery of equal size, NiMH batteries run for 30% longer on each charge cycle. They are also made from non toxic metals so they are environmentally friendly. They downside of NiMH technology is the overall battery life. These batteries generally last for 500 to 800 charge and discharge cycles.

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Lithium-ion
Lithium Ion (Lithium-ion) is the latest development in portable battery technology. These batteries do not suffer from the memory effect. Compared to a NiMH of equal size, a Lithium Ion will deliver twice the run time from each charge. Unfortunately, these batteries are only available for a limited number of models and are more expensive than NiMH. Similar to NiMH technology, Lithium-ion batteries have a life expectancy of 500 to 800 charge and discharge cycles. 99% of our laptop notebook batteries, digital camera batteries and digital camcorder batteries are this type.

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Memory Effect
A phenomenon in which a cell, operated in successive cycles to the same, but less than full, depth of discharge, temporarily loses the remainder of its capacity at normal voltage levels (usually applies only to Ni-Cd cells). Since our laptop notebook batteries, digital camera batteries, and digital camcorder batteries are Lithium-ion or NiMH, our batteries won't have memory effect and capacity reduction.

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Cycle
One sequence of charge and discharge. Deep cycling requires that all the energy to an end voltage established for each system be drained from the cell or battery on each discharge. In shallow cycling, the energy is partially drained on each discharge; i.e., the energy may be any value up to 50%.

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Cycle Life
For rechargeable cells or batteries, the total number of charge/discharge cycles the cell can sustain before it becomes inoperative. In practice, end of life is usually considered to be reached when the cell or battery delivers approximately 50% of rated ampere-hour capacity. A Lithium Ion or NiMH battery usually have a life span of 500 to 800 charge and discharge cycles, This translates into one and a half to three years of battery life for the average user.

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Battery Capacity
The electric output of a cell or battery on a service test delivered before the cell reaches a specified final electrical condition and may be expressed in ampere-hours, watt-hours, or similar units. The capacity in watt-hours is equal to the capacity in ampere-hours multiplied by the battery voltage. Our laptop notebook batteries, digital camera batteries and digital camcorder batteries' capacity is expressed in ampere-hours (Ah) or milliampere-hours (mAh) that are available to perform work. It depends on factors such as the endpoint voltage, quantity and density of electrolyte, temperature, discharge rate, age, and the life history of the battery.

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Ampere-Hour (Ah)
One ampere-hour is equal to a current of one ampere flowing for one hour. A unit-quantity of electricity used as a measure of the amount of electrical charge that may be obtained from a storage battery before it requires recharging. Every product page of our laptop notebook batteries, digital camera batteries and digital camera batteries show the number of ampere-hours which can be delivered by the battery on a single discharge. The ampere-hour capacity of a battery on discharge is determined by a number of factors, of which the following are the most important: final limiting voltage; quantity of electrolyte; discharge rate; density of electrolyte; design of separators; temperature, age, and life history of the battery; and number, design, and dimensions of electrodes.

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High Capacity
Larger number of ampere-hour quantity means higher capacity a battery has. Most of our laptop notebook batteries, digital camera batteries and digital camcorder batteries have higher capacity than original or OEM batteries, such as Sony PCGA-BP71 Lithium Ion Laptop Battery.

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Shelf Life
For a battery, the period of time from date of manufacture to date of sale. Every battery is fully charged on date of manufacture, and it self discharges during shelf life period. Our laptop notebook batteries, digital camera batteries, digital camcorder batteries have very short shelf life to keep them fresh due to our high sales volume and PO frequency. Moreover, our batteries are kept at a storage temperature of 70░F (21░C), which makes them reduce self discharge and retain energy content as much as possible.

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Self Discharge
Discharge that takes place while the battery is in an open-circuit condition.

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Open Circuit
Condition of a battery which is neither on charge nor on discharge (i.e., disconnected from a circuit).

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Charge
Applied to a storage battery, the conversion of electric energy into chemical energy within the cell or battery. This restoration of the active materials is accomplished by maintaining a unidirectional current in the cell or battery in the opposite direction to that during discharge; a cell or battery which is said to be charged is understood to be fully charged.

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Discharge
The conversion of the chemical energy of the battery into electric energy.

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Deep Discharge
Withdrawal of all electrical energy to the end-point voltage before the cell or battery is recharged.

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