texastreasures
New member
I have a simple question. Does the performance of White's detectors' change as the batteries discharge? I seem to notice a "sweet spot" when the batteries display an '11' power level, but I could be imagining things.
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battery charge and performance
- Thread starter texastreasures
- Start date
thebeatmachine
Member
there is a voltage regulator in the detector so the detectors actually run on 8V. That way you have long battery life with a 12 volt pack. Also alkaline batteries have a different voltage than rechargeable. 1.5 volt VS. 1.2 respectively.
texastreasures
New member
thebeatmachine said:
Thanks for your answer. I know the battery life is long, but is performance consistent throughout that life or does it decline toward the end of the batteries' lives?
Whether the voltage of the batteries is 12v or 10v the voltage regulator keeps the voltage to the detector at 8v. If the batteries are above the voltage regulator set point the detector will be consistent in its performance. I never have run mine below 10v but see no difference between 12v and 10v. Rob
Depending on how energy is pulled from the batteries, there could be a sweet spot at a particular discharge point in the batteries. This would be more possible with NiMH batteries due to their cell resistance characteristics over the discharge cycle. 8V seems like a strange voltage to operate on... maybe the power circuitry (coil Tx/Rx) runs at 8V, but there must be another regulator for the low level logic and microcontroller, either 5V or 3.3V. Just because it's "regulated", doesn't necessarily mean it's without imperfections over the life of the battery. I wouldn't worry about this kind of stuff though, it will drive you absolutely banana sandwich! 
texastreasures
New member
I detecting this evening with drained batteries (batteries @ level 9) and pulled a few wheat pennies at around 8". That's all the confirmation I needed that performance (sensitivity) is regulated throughout the batteries' life-cycle. I'm OCD about these things.