IEC 62700

IEC Technical Specification 62700: DC Power supply for notebook computer is an IEC specification of a common standard for external laptop computer AC adapters. Laptops and AC adapters following this standard will have interchangeable power supplies, which will enable easy reuse of used power supplies and make buying a new compatible power supply for a laptop simpler.
The specification was published on.

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 specification supports up to 100 W, and is intended to be able to power laptops.
EmPower is intended for passenger aircraft.

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