iPhone charging with an original data cable is harmful to the mobile phone, because the speed, voltage and resistance of data transmission are not consistent with the normal values, resulting in unstable input and output current and voltage, and a message that this accessory may not be supported will pop up, which will damage the life of the battery and the mobile phone if it is used frequently.
Extended information:
Apple's data cables have system support certification. If the data cables are not produced by Apple itself, the system will be incompatible with Apple's mobile phone or tablet. Even if this version is compatible, it may be invalid when Apple upgrades the system next time.
Common data cables are covered with PVC, TPE and nylon. The price of PVC data cables is relatively cheap, and the skin is smooth but the texture is relatively stiff. The original data cable is made of TPE material, which is flexible and delicate, but not strong enough; Nylon weaving is stronger than the above two materials, and it is wear-resistant, not easy to bend and not easy to roll.
you must not forget the MFi certification when purchasing the Apple data cable. "MFi" is the abbreviation of Made for iPhone, Made for iPod and Made for iPad. It is a licensing program provided by Apple for developers who develop and produce peripherals suitable for iPhone, iPod and iPad.