All Questions
Tagged with low-battery voltage
5
questions
2
votes
2
answers
4k
views
Voltage of 3 V batteries [closed]
I ordered 3 V CR2 batteries. Actually they are 2.92 V and 2.93 V.
Should I consider them faulty, or is this difference from the nominal voltage acceptable?
- 219
-1
votes
1
answer
485
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9v battery voltage goes down very low when connected, but shoots back up when it is disconnected?
Whenever I leave a 9v battery connected to my circuit (simple circuit connected to a motion sensor) It goes down to about 3.3v, but when I disconnect it again, it will slowly go back up to about 8v. ...
0
votes
3
answers
3k
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Why is voltage level affected by low temperature?
I have designed a circuit that uses this low-battery-indicator:
http://www.homemade-circuits.com/2013/05/low-battery-indicator-circuit-using-two.html
I use 4xAA Lithium batteries to drive an Arduino ...
- 11
8
votes
2
answers
10k
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What's a good estimate on how low an alkaline battery voltage can be to still make the battery useful?
Here's a YT video by Duracell about how many batteries declared dead and sent to recycling still have some usable energy. In the beginning of the video there's a sequence where they have a row of ...
- 12.5k
7
votes
4
answers
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how to build a low-voltage disconnect switch for DC 12.4V 70A?
How can I make a device that will make the power connected as long as the voltage of the power-supply keeps over 12.4 V (adjustable) and disconnect it if it falls below?
It also must connect the ...
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