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Non-Contact Voltage Tester Tools,Black-Red LED Flashlight,Buzzer Alarm,AC Voltage Detector Pen,Test Range 60V - 1000V for Live/Null Wire Judgment

Q: Does the wire have to be stripped for it to detect voltage? or can it detect it at the part that is lightly insulated?

I did not have to strip the wire to detect voltage.

Q: Does this drain the batteries when not in use?

Based on Mike's measurement of about 13uA (0.013mA) the batteries should last over 9 years. (I measured less than 10uA) AAA batteries have a capacity of about 1,000 mA-Hours. With a drain of 0.013 mA the battery will supposedly last 77,000 hours or 3,200 days or 9 years. However, the literature says an alkaline battery with no load will be dead in 5 to 10 years. The bottom line - this tester will be alive for years with the batteries installed.

Q: does this unit test dc current?

No. It detects a varying electric field, which only an AC voltage can produce, via capacity coupling. Not that even in AC, it detects voltage, not current; no current has to be flowing in the wire for the detector to light up.

Q: does it come with batteries?

It does not come with batteries You will need 2 AAA batteries

4.2/5

Product ID: 714252846

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Description

Non-Contact Voltage Tester Tools,Black-Red LED Flashlight,Buzzer Alarm,AC Voltage Detector Pen,Test Range 60V - 1000V for Live/Null Wire Judgment

Have a Question? See What Others Asked

Does the wire have to be stripped for it to detect voltage? or can it detect it at the part that is lightly insulated?

Does this drain the batteries when not in use?

does this unit test dc current?

does it come with batteries?

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TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

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