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 element is 100% reliable because the shape memory effect is intrinsic to the alloy.
Despite the extensive research on SMPs, commercialization of SMPs is rather limited due to the difficulty in engineering the molecular structure to achieve the shape memory effect.
5 If you're primed to find them attractive - Priming is a memory effect that occurs when you are exposed to something that later influences how you respond to something else.
It exhibited a memory effect and did not require a continuous current to maintain the opaque state, so its power consumption remained very small.
With its memory effect technology, the spray will give you flexible hold, pliable texture and a natural shine it is a must-have for your hair.
The 108 papers selected for ESOMAT 2012 present recent results on the mechanical behavior, shape memory effect, pseudoelasticity and other functional properties of copper-based, titanium nickel-based, and iron-based alloys.
Memory effect is something that can only happen to nickel cadmium batteries that are repeatedly discharged to the same point, say 50 per cent, before being re-charged.
However, commercialization of thermoplastic elastomers (TPEs) with shape memory effect is limited due to the difficulty in engineering the molecular structure to achieve shape memory effect.
The cable uses an advanced flexible sheath material featuring high abrasion resistance, whilst remaining flexible and kink-free but without a memory effect.
One of the principal values which sets Xtraice aside from the competition is that is has eliminated the memory effect in its products.
While the present study also employed a short test-retest interval (2 weeks), it was expected that memory effect would be controlled by the methodology employed.