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AA Battery Capacity-Introduction, Calculating And Protection

AA Battery Capacity-Introduction, Calculating And Protection

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AA batteries are one in all the foremost common forms of swappable power cells in circulation today. It could be a standard-sized single cell cylindrical voltaic battery; the battery consists of either one cell, either a primary battery that's disposable or a chargeable battery. The precise terminal voltage, capacity, and practical discharge rates depend upon cell chemistry; however, AA cell devices will mostly only take 1.2-1.5 V unless specified by the manufacturer. AA batteries are standard in portable electronic devices.

If you want to know about AA battery capacity, read on.

How much capacity does a AA battery have?

Primary cells are the non-rechargeable cell product of zinc-carbon (dry cell)AA batteries with around 400 to 900 Mili capacity, which is very smitten by test conditions cut off voltage and the duty cycle. Zinc carbon battery is being marked as the general-purpose batteries. The zinc-carbon battery, which is kept under 1000 to 1500 mAh, is commonly sold as heavy duty.

Lithium iron sulfide batteries are made for such devices that draw more current like the digital cameras. Their high cost is compensated by the more extended period between battery changes, and it also provides a more constant voltage during discharge. When the release current increases within the alkaline batteries, their capacity is significantly reduced. Lithium iron sulfide batteries are less susceptible to leak as compared to alkaline batteries. This can be vital as a leaking alkaline battery can damage the equipment used thanks to the corrosive electrolyte coming into contact with the sensitive electronics. Lithium sulfide batteries can have an open-circuit voltage, which may be as high as 1.8 volts. Still, during this case, the closed-circuit voltage decreases, making the chemistry compatible with equipment is meant for zinc-based batteries. An alkaline zinc battery can have a circuit of 1.6 volts, and a lithium sulfide battery with an open-circuit voltage below 1.7 volts is discharged.

Rechargeable batteries within the AA size are available in various chemistries. Like nickel-cadmium with the capacity of roughly around 600 to 1000 mAh, nickel-metal hydride NiMH in power starting from 600 to 2750 mAh, and Lithium iron batteries with a nominal voltage of 3.6 to 3.7 volts, which I usually referred as Li-ion batteries instead of AA batteries.

NiMH and Lithium-ion AA/14500 cells can supply most of the capacity even after they are under high current like 0.5 amperes or higher, unlike the alkaline and zinc chloride cells, which drop a tiny fraction of their low current capacity even before reaching 1C.

Standard Alkaline AA Batteries

●Won't typically last very long in high-drain devices like digital cameras; they can't output their full power fast enough to address the strain of high-drain electronics, especially well

●Can be vulnerable to leaking when over-taxed or kept for long periods of your time

●Are far better employed in low-drain devices with fewer significant spikes in power draw to handle

●Have a reasonably long period when not installed, and are among the foremost economic styles of AA battery within the short-term

Lithium AA Batteries

●Much better than alkaline at managing high-drain demands, and might last for years within the right kind of device

●Have a very long period, and won't leak over time

●Are not typically available in rechargeable varieties

●Tend to be dearer than AA alkaline cells

Rechargeable AA Batteries

●Likely an improved bet for any devices that are going to be in heavy or regular use for extended periods of your time, especially with higher-drain circuits

●Tend to be more costly within the short-term, but quickly become rather more cost-effective than single-use cells (even budget alkaline disposables) if you're going to be draining them fast and frequently

●Are best bought in multiples of the quantity needed for the device in question, so there's always a replacement set charged and prepared to travel

●Will require a discrete charger, either bought separately or supplied as a part of a bundle

How does one calculate AA battery capacity?

The capacity of the battery is measured in milliamperes × hours (mAH). For example, if a battery has 250 mAH capacity and provides 2 mA average current to a load, the battery will last 125 hours in theory. In reality, however, the way the battery is discharged has a sway on the particular battery life. Removing the battery at the manufacturer-recommended rate naturally helps the battery deliver near its nominal capacity.

The other way to measure the capacity of an electric battery is:

The power P of a device is adequate to voltage V multiplied by the current I :   P = V * I

As energy E is power P multiplied by time T, all we've got to try to determine out the energy stored in a cell is to multiply each side of the equation by time: E = V * I * T

You must know that amp hours are a measure of electrical charge Q (the battery capacity). Hence, the ultimate version of the battery capacity formula appears like this:  E = V * Q

where E is the energy stored in a battery and expressed in watt-hours;

V is that the voltage of the battery; Q Is that the battery capacity, measured in amp-hours.

How do you protect a AA battery capacity?

In order to protect your AA battery capacity, follow the below tips

  • Ensure they're stored in a dry and cool environment (room temperature or below)
  • Keep them in their original packaging until ready to be used. This not only helps to guard unused cells but also differentiates them from older or partially drained units.
  • Don't store batteries inside devices if you're not visiting be using them for an extended time
  • If you're holding a mix of brand name-new and partially used batteries, keep them separate and clearly labeled
  • Make sure they're unable to tangency through direct contact with the other metal items - use a plastic battery storage box, individual plastic bags, or put tape over the terminals
  • Periodically test and top-up rechargeable AA batteries, if they're visiting be stored for a protracted time, as letting them fully discharge in storage, can seriously deplete their capacity

Keep the above tips in mind and you’re sure to do your best to protect your AA battery capacity.

 

 

 

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