The FlexVolt 54V Grinder from Dewalt seems to be in a league of its own. It claims to have better than corded performance. oztooltalk have put it through its paces to find out whether the 125mm DCG414 can backup those big claims.

In North America, it is referred to as a 60V Max 5" grinder.
http://amzn.to/2t5An4p
http://www.dewalt.com.au/search/searc...