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Uncommon ways to charge an USB device?

Forums › Forums › Gear – The Stuff We Carry › Electronic Devices › Uncommon ways to charge an USB device?

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  • September 26, 2025 at 6:31 am #25205
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    Keymaster

    Our internet broadband modem had a USB jack on the back which could be used to charge devices, but that modem was replaced with a newer model which lacks a USB jack. Our SONY Bravia television has 2 USB jacks on the back panel. I can use them to charge a cell phone only when the TV is powered on. The jack goes dead when the TV is turned off.

    September 26, 2025 at 6:31 am #25207
    admin
    Keymaster

    Used the “USB media port” of a car radio to (very slowly) charge my smartphone.

    2,5 Watt (500mA * 5 Volt) is “nothing” compared to the 30 Watt my wall charger provides, but it added some % to the battery and allowed me to come home with a phone still online.

    September 26, 2025 at 6:31 am #25209
    admin
    Keymaster

    Over the course of the last two weeks I had to use a smart TV’s USB A port as well as the similar port of an DSL router … again both were limited to 500mA/5V = 2.5W read: very slow charging. Anyway my phone was charging …

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