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How long do batteries last in a smoke detector? 

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They can be installed by a homeowner just as they would a normal smoke detector.
Such a procedure enables to quickly discriminate separators by leading experiments that do no not exceed 1 week compared to hundreds of days needed with classical batteries.
We suggest that dual batteries having 3 V, 3000 mAh, would last 8 years by analyzing the real power consumption of our water meter.
The prognostics in batteries provide warning to the advent of failure, which requires timely maintenance and replacement of batteries.
With simple mechanical structure and high accuracy, this sensor improves the performance of optical fire smoke detector with high sensitivity, low-cost and unique ability to resist the false alarms caused by non-fire aerosols.
These characteristics of smoke detector usage and acquisition should be considered in targeting future intervention strategies.
Experimental results on different video frames show that the proposed smoke detection system has robust performance on detecting the existence of smoke which shows the effectiveness of the proposed smoke detection system.
Finally, the long-term stability of this detector was satisfactory in that only a approximately 6% decrease in the current responses was observed after a rather long period (2 months) of continuous use.
Using these models, we demonstrate how we can (i) accurately predict end-of-discharge for aged batteries, and (ii) predict the end-of-life of a battery as a function of anticipated usage.
It is, therefore, recommended that smoke detector alarms be installed in the bedrooms themselves such that the signal intensity is at the maximum level tolerable to the human ear, that is approximately 90 dBA.
It is shown that such a smoke detector is able to operate reliably under low concentration of smoke and high relative humidity conditions.
Experimental results show that the proposed four-stage smoke-detection algorithm outperforms conventional smoke-detection algorithms in terms of accuracy of smoke detection, providing a low false-alarm rate and high reliability in open and large spaces.
The results of these experiments show that the smoke detectors, especially the ionization detector, are sensitive to cooking fumes and nuisance alarms are easy to happen.
Alarm algorithms utilizing ionization detector smoke measurements proved to be more effective than measurements from photoelectric detectors.
Open accessJournal ArticleDOI
J. Geiman, D.T. Gottuk 
25 Citations
The data showed that there was a large amount of variability in the measured smoke optical density values outside a detector at the time of alarm.
It was proved that the proposed method is able to reliably detect the long-distance wildfire smoke and simultaneously produce very few false alarms in actual applications.
However, the learning of smoke representation in the detectors will be restricted by the appearance gap between real and synthetic smoke samples, which will cause a significant performance drop.

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