Aa And Aaa Battery Charger Technology

By: judy

An AA battery charger is a piece of equipment that is used to charge, rechargeable batteries. Double A batteries are the thin batteries that are typically used for remote controls, cameras and other small battery dependent devices. These devices can only be used with rechargeable batteries. One thing is for certain; using rechargeable batteries in lieu of disposables is a good idea - not just for your pocketbook, but also for the environment. Rechargeable batteries can be used over and over again, unlike disposables that end up in the landfill.
This is ok if that is all the information you require from your charger, but if you want more then you need a LCD display screen. LCD screens are an important feature for battery chargers as it displays the batteries current charge and the batteries potential after it has been charged. LCD screens tell the time remaining until the battery has been fully charged and when the battery is done charging. The LCD screen can display the charging current, time elapsed, terminal voltage, and accumulated capacities.
The two-way micro chip communication senses the battery level while charging is in progress. It then processes this information between the battery and the battery charger to achieve optimal charging levels. This communication between the two devices allows for the optimal charge to be achieved in the time allotted.
The most popular method for charging Nicad batteries is using a negative delta V (NDV) cut-off charge system because it offers a rapid response time. This NDV system alerts the charger when the battery is full charged by dropping the voltage output. The voltage drop is a response from polarization or oxygen build up inside the battery cell. If a fully charged battery is being recharged, then the terminal voltage will quickly rise, followed by a sudden drop off point, triggering the ready to use state. This lasts for a few minutes and the battery cells remain cool at all times. It is recommended to have a charger that responds to a very small voltage decrease, over those that require a larger decrease.
Smart AA and AAA battery chargers are technologically advanced. The charger responds to the charging instructions from the battery. These chargers use smart batteries that can remember and store information about its specific charging characteristics. The charger picks up on these requirements and adjusts the charging voltage, current, temperature, and other characteristics to the batteries needs. These chargers are great and easy to use.
Battery chargers can even turn themselves off after a charge has been completed. These are called automatic battery chargers and they utilize an end of charge voltage point to stop the charger or to switch to a trickle charge. The trickle charger is the slowest battery charger. With a trickle charger you can indefinitely leave the battery charging without ever overcharging it. This is because the battery is being charges at the self-discharge rate, the slowest rate possible. The charger is not suitable for Lithium and NiMH batteries, which subject to overheating. Some battery chargers switch to trickle charge when the battery has been fully charged. This prevents the battery from overcharging and is a good function to look for in a charger. The trickle charge is advantageous in that in cold climates they can keep the battery warm.
There are different options when it comes to your power supply for the charger. Either you can have an external or an internal power supply. An internal power supply is more convenient as the plug is built into it and there are no unnecessary wires lying around. If you want to have your charger closer to you then an external power supply is the way to go. It comes with an extra plug, which allows you a few feet of wire. Also make note of the charger to see if it has an AC Adapter, a DC Adapter, or both. Remember that AC Adapters are for wall outlets, while DC Adapters are for car cigarette lighter adapters. Some battery chargers include both AC and DC Adapters, while some only include one or the other. Be sure to read the package to know exactly what you are getting with your battery charger.

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