Alternatives
Despite being an industry open organization with open participation, the standard has been criticized by some for not being openly available for review. Some alternatives include: * IEEE has a proposed standard Universal Power Adapter for Mobile Devices for laptops and other devices. * The USB Promoters Group's USB Power Delivery ("PD") specification supports up to 240 W, and is intended to be able to power laptops. * The EmPower adapter was intended for charging laptops on passenger aircraft.See also
* Universal charger * USB Power Delivery Rev. 3.1 - includes Standard Power Range (SPR) mode with up to 100 W of power (20 V @ 4 A) and Extended Power Range (EPR) mode with up to 240 W of power (48 V @ 5 A) * Common external power supply - EN 62684 / IEC 62684, a widely adopted 2010 European specification standardizing smartphone power supplies on the USB Battery charging specification and USB connectors.References
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