If you cannot find one locally, you can get one on Amazon tax and shipping free.
http://www.amazon.com/gp/product/B0...Code=as2&tag=ph079-20&linkId=Q5CJDGO73DTVLG2M
I will prefer to go for sine wave inverters.Nope. You can find a few power inverters that'll work with the DJI battery charger here.
Well, you're in luck. I have a pure sine inverter linked thereI will prefer to go for sine wave inverters.