Thx tooki
iPhone fast charging requires USB-C
The article was published 2020,,,,I guess before type C,,,,, USB type A was doing a fast charging as well ,,,,please see the link below for car charger by TomTom it says Fast Charging and it is using USB A
https://tomtom.factoryoutletstore.com/details/47894/high-speed-multi-charger-for-tomtom-.html?category_id=30519&catalogitemid=46382
I would assume that can be the case on wall adapter ?
a cheap cable limited my iPad's charging to around 700mA
The cable that I have used it is genuine
But the 750mA for your iPhone on a 5V charger sounds about right to me
But would that consider as a fast charging ? If not how can we achieve fast charging ?
OK, we need to establish some basics here!
1. "Fast charging" does not have a fixed, industry-standard meaning. That's why I said specifically "iPhone fast charging", since the only device you mentioned was an iPhone X. Every product can have its own meaning of "fast" charging, with its own implementation and/or requirements.
2. USB-C has been around since 2014.
Thus:
In Apple's iPhone charging definition, 5V/750mA charging is not considered "fast charging", it's just the maximum of normal speed charging. (Yes, this does indeed mean that the 5V/500mA chargers supplied with most iPhones charge them slower than they're capable of, presumably to be gentler on the batteries and allow for the cheaper, more compact charger size.) The charging current you're seeing is correct for the charger type being used.
TomTom's charging speed definitions are irrelevant to Apple devices and vice versa. iPhone "fast charging" requires USB-C; other devices can require whatever they want. Various fast charging systems have existed for a while, like Qualcomm QuickCharge.