![]() The USB standard included power supply to peripheral devices modern versions of the standard extend the power delivery limits for battery charging and devices requiring up to 240 watts. All versions of USB specify cable properties version 3.x cables include additional data paths. Higher-speed development of the USB standard gave rise to another family of connectors to permit additional data paths. The initial versions of the USB standard specified connectors that were easy to use and that would have acceptable life spans revisions of the standard added smaller connectors useful for compact portable devices. Standard-A receptacle (inverted, so the contacts are visible, though extension cables are not allowed in USB). ![]()
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