Energy Efficiency of Mobile Device Recharging

Jussi Ruutu, Jukka K. Nurminen, Kari Rissanen

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    Because of losses in electricity conversion and storage only part of the energy taken from the power grid produces useful work in a battery-operated mobile device; the rest evaporates as heat. The authors analyze the recharging activity of a mobile phone to understand the efficiency of the different units involved (charger, EPM chipset, battery). Their measurements show that the efficiency is quite low; only about 15% of the electricity from the power grid ends up being used for the actual computing and communication elements of the mobile phone. It seems that there is room for improvement in the recharging efficiency. However, as the consumption of electricity of a single phone is small the incentive for improvements has been weak.
    Original languageEnglish
    Pages (from-to)59-69
    JournalINTERNATIONAL JOURNAL OF HANDHELD COMPUTING RESEARCH
    Volume4
    Issue number1
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Efficiency, Energy, Mobile Phone, Power, Recharging

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