Specifications:
Type: Ni-MH
Capacity: 2000 mAh
Voltage: 1.2V
Height: 50.5 mm
Diameter: 14.15 mm
- Up to 1500 times rechargeable! (50% Extra!)
More......Eneloops detail
O problemă majoră la acumulatori este aşa-numita auto-descărcare ,un acumulator complet incarcat va pierde un pic în fiecare zi din capacitate ,la acumulatorii NiMH autodescarcarea este de aproximativ 10% după primele 48 de ore, şi în fiecare lună aproximativ 30%,.Un acumulator de 2500mAh conţine dupa doar o saptamana de la incarcare numai 1750mAh si 1250mAh după aproape o lună. Acest tip de acumulator fiind potrivit doar pentru dispozitivele care au nevoie imediata de energie. Trebuie să reîncărcaţi acumulatorii atât de des, chiar dacă acestia nu sunt adesea folositi. Bateriile NiCd au auto-descărcare de aproximativ 20% pe lună, doar pare a fi o cale de ieşire, deoarece acestea au o capacitate mult mai mică. Soluţia problemei ar putea fi Eneloop, deoarece aceasta pierde din sarcina doar 15% - pe an.
The low self-discharge nickel-metal hydride battery (LSD NiMH) was introduced in November 2005. These batteries were developed by Sanyo who called them Eneloop Subsequently, other manufacturers also offered LSD NiMH.
This kind of battery reduces self discharge and, therefore lengthens shelf life compared to normal NiMh batteries . By using an improved electrode separator and improved positive electrode, manufacturers claim that the batteries retain 70 to 85% of their charged capacity after one year when stored at 20 °C (68 °F). Standard NiMH batteries may lose half their charge in the same time period. Retention of charge depends a lot on the battery's impedance or internal resistance (the lower the better), and on the size of the battery as well as the mAh rating.
High quality separators are very important for battery performance. Thick separators take up space and reduce capacity, while providing a low-tech way of reducing self discharge, while thin separators tend to raise the self discharge rate. Some batteries may have overcome this obstacle with more precise manufacturing techniques and by using a more advanced sulfonated polyolefin separator.
When compared to regular NiMH batteries, low self-discharge types are most useful when more than three weeks elapse between charge and discharge to empty, on average, or to ensure that stored devices are usable several weeks after charging of batteries. Specifications for the self discharge rate are not always clear or widely published, and virtually any LSD may claim to maintain some level of charge after 12 months. A non-LSD battery typically self discharges at a rate of about 20% within the first 24 hours, then from 1% to 4% per day thereafter.In devices not accurately calibrated to closely predict battery level, run-times for LSD NiMH batteries can be as good or even better than normal cells with higher rated capacity, because the slightly higher operating voltage doesn't trip a device's under-voltage shut off circuit.
Batteries with low internal resistance waste less energy and capacity on self-heating during rapid discharge and recharge. Low self-discharge NiMH batteries typically have significantly less internal resistance than traditional NiMH batteries.
There are many brand names for LSD NiMH batteries. Most manufacturers produce only size AAA and AA batteries, and most low self discharge batteries are sold in these sizes. Larger size C and D cells are available, though some are merely AA cells inside a C/D-sized case. Maha offers an LSD "D"-cell called the "Imedion" self-rated at 9500 mAh, Accupower offers the "Acculoop" self-rated at 8500 mAh, and Tenergy offers the "Centura" self-rated at 8000 mAh.
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