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memory effect

   Also found in: Wikipedia 0.01 sec.
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.


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Lithium-ion battery are featured with the high energy density, power density, no memory effect, little self-discharge and a long circling life.
The researchers observed that during each test trial, participants frequently spent more time viewing the face that had been previously paired with the scene-an eye-movement-based memory effect.
The other good thing about this is that they do not suffer from any sort of a memory effect, which means that their self discharge rate is only about less than 7% per month, so you are not losing as much energy.
 
 
 
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