You can use any charger you want, just make sure it is a good quality one along with a good quality USB lead.
The dash charger will work but it wont charge at fast speeds, dash charging is unique to OnePlus and only charge at full speed on them.
I am using Blitzwolf BW-S5 Qualcomm QC3.0.
It is Qualcomm certified and includes circuit protection system against overvoltage, overcurrent, overheating and short circuit. I recommend it. Just checked and seen that it's available on amazon india at price of 899 rupiah.
Hope this helpes.