Is it okay to use dual lightning port adapter?

Hello Azarianfa,

Thanks for using Apple Communities.

If the product is MFI (Made for iPhone) it has no problem. Usually the product box has a symbol printed. The article https://support.apple.com/en-us/HT204566might help you at looking for. Caution with thirdy parts uncertified.

With regards,
Alefe ****

[Personal Information Edited by Host]

Azarianfa wrote:

No mfi logo. Now, i’m afraid it may damage my battery. Regret. I want buy from belkin but the price is too expensive for me. 50$ just for the adapter? No thankyou.

The Belkin adapter is $40 in the U.S. Apple Store. And, that's a lot cheaper than paying for out of warranty repairs if something goes badly wrong with your certified adapter.