AGM (Absorbent Glass Mat ) Separator. AGM (Absorbent Glass Mat ) is a non-woven fabric made with glass microfiber. It has been available for more than 30-years and has been used in VRLA batteries world-wide.
What is the purpose of a separator?
The term separator in oilfield terminology designates a pressure vessel used for separating well fluids produced from oil and gas wells into gaseous and liquid components.
What is the role of electrolytes in battery?
The electrolyte is a chemical medium that allows the flow of electrical charge between the cathode and anode. When a device is connected to a battery — a light bulb or an electric circuit — chemical reactions occur on the electrodes that create a flow of electrical energy to the device.
Battery is a criminal offense involving the unlawful physical acting upon a threat, distinct from assault which is the act of creating apprehension of such contact. In most cases, battery is now governed by statutes, and its severity is determined by the law of the specific jurisdiction.
A battery is a device that stores electrical energy and can then deliver that energy through an easily controlled electro-chemical reaction. A schematic of a lithium-ion cell. Reprinted courtesy of HowStuffWorks.com. A battery is usually composed of a series of cells that produce electricity.
Take a single-use alkaline battery for instance. These are the non-rechargeable type batteries that come in AAA, AA, C, D, 9 volt and various button cell sizes. On average, 25% of the battery is made up of steel. 60% of the battery is made up of a combination of materials like zinc, manganese and potassium.
In a rechargeable battery, however, the reaction is reversible. When electrical energy from an outside source is applied to a secondary cell, the negative-to-positive electron flow that occurs during discharge is reversed, and the cell's charge is restored.
Q: How many times can a NiMH battery be recharged? A: Lower capacity rechargeable AA batteries of 1700 up to 2000mAh can be recharged up to 1000 times in overnight slow charge mode, while 2100 to 2400 mAh rechargeable batteries can be recharged up to 600 to 800 times in overnight slow charge mode.
Generally, NiMH batteries that are properly cared for (charged and used often, stored in a cool, dry place, and not dropped) will last for 500 – 1000 charges or approximately two to three years. Remember, the more you use and charge NiMH, the longer they will last.
Lithium Ion batteries "go bad" when they are stored in discharged state. If voltage is too low - undesireable chemical reactions will happen and battery will degrade. If battery is not empty and not used for long time - it will be fine. However batteries are not perfect and they slowly discharge without load.
The overall lifespan of a battery is expressed in charge cycles. One cycle is a complete discharge followed by a complete charge. It stands to reason that the life expectancy in years varies depending on the use to which the batteries are put. In general, rechargeable batteries can stand from 500 to 800 charge cycles.
Batteries operate on a chemical reaction. It is probably a conservative date, so most batteries will have a full life after that time. Better batteries will show a later expiration date. Alkaline battery life is so dependent on how the batteries are used, and there are no standards.
Overall, the best rechargeable AA battery is the Eneloop Pro. They have a high energy capacity (2500 mAh), and they perform better than similar high-capacity AAs. They can only be charged 500 times (versus 2100 times for regular Eneloops). But most people will never charge their batteries that many times.
In informal tests, Eneloop Pro retained 2035 mAh of capacity after 7 weeks of storage, which was higher than any other NiMH battery (both regular or low-self discharge), making it the longest lasting rechargeable AA battery.
The lithium-ion rechargeable battery for example, has proven to be efficient, especially in consumer electronics. Disposable batteries last longer than rechargeable batteries, but only initially. When it comes to rechargeable batteries, they last much longer as you can recharge them.
A number of studies have shown that storing batteries in the freezer helps them retain their charge longer. So if you live in a very hot climate or are storing your batteries in a very hot location, it may be worthwhile for you to store your alkaline batteries in a refrigerator instead.
Better for the Environment. When taken to landfills, most batteries (even rechargeables) can release harmful metals such as mercury, lead and cadmium into the environment. And, because batteries can be recharged and reused numerous times, they contribute less waste to landfills.
Rechargeable batteries produce less waste because they can be recharged with a simple battery charger and reused hundreds of times. They also use less energy because recharging batteries with a battery charger is more energy efficient than the cost and energy of making new batteries.
Rechargeable batteries should not be used in some of the devices because they do not supply the proper voltage needed to run products. They will not ruin the devices, but most will not work properly. New and fully charged Rechargeable batteries of the same size only put out 1.2 Volts.
Technically, NiMH batteries do not have a "memory effect", but strictly speaking neither do NiCds. However NiMH batteries can experience voltage depletion, also called voltage depression, similar to that of NiCd batteries, but the effect is normally less noticeable.
A NiMH in a NiCd charger would overheat, but a NiCd in a NiMH charger functions well. Modern chargers accommodate both battery systems. It is difficult, if not impossible, to slow charge a NiMH battery. Harmful overcharge can occur when charging partially or fully charged batteries, even if the battery remains cold.