memory effect


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memory effect

The condition of rechargeable nickel cadmium and nickel metal hydride batteries in which it continues to hold less of a charge over time. It is said to "remember" how full it was when last charged because it will not charge past that point the next time. This is why you should completely drain nickel-based batteries every month or so.

The memory effect is caused by a combination of chemical reactions; however, the cadmium in a nickel cadmium battery is the bigger problem and why nickel metal hydride batteries fare somewhat better. In a fresh battery, the anode's cadmium crystals are approximately one micron across. If the battery sits in the charger too long or is not fully discharged, over time, the crystals grow to as much as 100 microns. This conceals more of the active material to the electrolyte and reduces battery life. For an exhaustive look into the world of rechargeable batteries, visit www.batteryuniversity.com. See batteries.
References in periodicals archive ?
The N-Charge Power System uses environmentally friendly batteries, has no memory effect, and is capable of accommodating a variety of wireless devices.
Emotions are critical to this memory effect, Strange says.
Remember, a dead battery has a memory effect, which means it will give a short charge after a rest and make you think you've got a dot again.
According to New Scientist, it's thought the memory effect could be down to the sperm's swimming mechanism righting itself after turning one way.
The Ni-MH batteries have no memory effect and can be recharged hundreds of times, according to Denning.
That is to say, we've come across a vast domain where we have to explore, indefinitely, the horizontal connections between cultural works, signs, and letters - as if the modern (or technological) access to layers of historical information produced the memory effect of making everything (all of "culture") contemporary, or offered us the possibility of reproblematizing the works of history through new connections and distinctions.
Of the three, NiCad batteries have the least storage capacity and are susceptible to a problem called memory effect.
The Logical charger does not cause memory effect, according to Bra-zukas.
It ran on battery power, but they were nickel cadmium batteries that did not last long (less than one hour) and quickly lost their full charge due to an annoying memory effect.
The counter ions surrounding the molecules act like the ratchets on a wrench, and offer stability to the various electronic states of the molecule which are necessary to achieve the memory effect.
The finding implies that the movement of the ball/front-line at any given time has a strong influence on subsequent actions due to the so-called memory effect, linked to the game's fractal nature.