I'll tell you my experience.
I bought a local made charger for 600 with 6 months warranty. It worked fine for 8 months, then gone.
So now I bought an original charger at 2k, with 2 years warranty. Its working fine for 5-6 months now.
My friend bought a local made one for 1k, which lasted for almost 10 months
Both the local chargers went kaput after getting heated up too much
I'll say, buy original one.