To date, there has been no concerted effort to truly create a uniform standard for laptop chargers, but that's changing. The International Electrotechnical Commission [IEC] Technical Specification 62700 is the one to pay attention to, as it would push a wide array of laptop makers to agree on a universal standard for charging.
IEC general secretary and CEO Frans Vreeswijk had this to say: "The IEC International Standards for the universal charger for mobile phones has been widely adopted by the mobile phone industry and is already starting to help reduce e-waste. A single power supply covering a wide range of notebook computers is the next step in lowering e-waste and its impact on our planet. I am proud that the IEC has yet again managed to make the best possible technical solution available."
The benefits would be numerous: supply chains would be easier to manage, and e-waste would likely go down. The new standard seeks to cover the charging plug, connector, and even the environmental considerations. It's hoping to have the charger ready for distribution next year, but as we've seen in the past, getting a meaningful amount of large companies to agree on implementing it will be easier said than done.