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Qi (/ tʃ iː / CHEE) is an open standard for inductive charging developed by the Wireless Power Consortium.It allows compatible devices, such as smartphones, to receive power when placed on a Qi charger, which can be effective over distances up to 4 cm (1.6 in). [1]
Official specifications of the Qi interface standard and the example of the standard in use by a charging pad and the compatible device. The Wireless Power Consortium was established on 17 December 2008. It officially published the Qi interface standard and the low-power specification in August 2010. In October, Nokia joined the WPC. [31]
Inductive charging (also known as wireless charging or cordless charging) is a type of wireless power transfer. It uses electromagnetic induction to provide electricity to portable devices. Inductive charging is also used in vehicles, power tools, electric toothbrushes, and medical devices.
IEEE P1823 was a proposed global standard for a universal power adapter for mobile devices (UPAMD) that require between 10 W and 240 W. E.g., Laptops, larger tablets and other mobile devices that can require much more power than the (non-Power Delivery) USB battery charging specification limit of 7.5 W at 5 V. [25]
Quick Charge 4 supports HVDCP++, optional Dual Charge++, INOV 3.0, and Battery Saver Technologies 2. It is cross-compatible with both USB-C and USB-PD specifications, supporting fallback to USB-PD if either the charger or device is not QC-compatible. However, Quick Charge 4 chargers are not backward compatible with Quick Charge. [7]
Samsung: Ativ Tab: Windows RT 2012 - November P8510 Galaxy Tab Active: Android 2014 - December all versions NXP PN544 Galaxy Tab Active 2 Android 2017 - November all versions Sony: VAIO Tap 20: Windows 8 2012 - November all versions Xperia Tablet Z: Android 2013 - May all versions Xperia Z2 Tablet: Android 2014 - March all versions Xperia Z3 ...