A smart phone Lithium Ion (Li-ion) battery has a capacity of 1200 mAh. The battery can be used for 4.5 hours t

October 25, 2009 by admin · 1 Comment
Filed under: Mathematics 
smart phone
manifela asked:


A smart phone Lithium Ion (Li-ion) battery has a capacity of 1200 mAh. The battery can be used for 4.5 hours talktime, or for 10 days on standby. Approximately how much current does the smart phone draw (i) during ‘talktime’ (rounded to the nearest whole number) and (ii) when on standby?

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One Response to “A smart phone Lithium Ion (Li-ion) battery has a capacity of 1200 mAh. The battery can be used for 4.5 hours t”
  1. RJB says:
    October 25, 2009 at 10:02 am

    Talking:

    1200/4.5 = 266.6 mA or 267 mA rounded.

    Standby:

    10 days = 240 hours

    1200/240=5 mA RJB

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