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This question already has an answer here:

How much voltage is required for the earphones by which we listen voice and songs ? Please help with the calculations if possible??If we keep our earphones plugged with our mobile phones,do the battery gets discharged faster?

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marked as duplicate by PeterJ, Chris Stratton, Dave Tweed Jul 5 '15 at 20:35

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  • \$\begingroup\$ The meaningful part of this question is a duplicate. Obviously any sane design for a battery powered audio device will not present a DC bias across a speaker (indeed, that is generally avoided regardless of the power source) so there should be next to no power consumption when not actually producing audio. \$\endgroup\$ – Chris Stratton Jul 5 '15 at 15:45
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https://en.m.wikipedia.org/wiki/Headphones&ei=UrJ17-UO&lc=en-IN&s=1&m=174&ts=1436104106&sig=AG8UcunnivMSbvZCzuXAwPxxkXXEU1H_rw

You can refer to this Article for calculation part under sensitivity section. Regarding the discharge part I don't think plugging on would lead to higher battery drain because once earphone is plugged it bypasses the inbuilt speaker which consumes a lot more power than earphones. I hope the answer is right.thanx

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  • \$\begingroup\$ Most phones today do not have the earphone bypass the speaker, rather a second audio path becomes available but software selects between them (rings still go to the speaker typically), and when not producing audio neither is active. \$\endgroup\$ – Chris Stratton Jul 5 '15 at 15:46

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