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time calculation for the circuit which is battery powerwed

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shahbaz.ele

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dear all
I have a circuit consuming 120mA current on dc poer supply of 12V.
I have a battery of 6.8mA, 12VDC

how can I calculate the estimated time that this battery can provide for 120mA consuming circuit.

Thanks in advance.
 

Hi,

I have a battery of 6.8mA, 12VDC
Click to expand...
What does this 6.8mA mean?
A battery has a "Ah" or "mAh" specification for capacity/charge.

When you do a search "battery lifetime" here in this forum you will find a lot of hits.

Generally: A x h = Ah --> h = Ah / A

Klaus
 
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