Cordless or corded angle grinder, which should I buy?

Across the reviewers we read, the consensus is that corded grinders (11A and up) still deliver the most sustained power per dollar for heavy grinding, while modern brushless cordless tools like the Milwaukee M18 FUEL 2880 and DeWalt FlexVolt Advantage are now close enough to corded performance for most jobs. Specialist welding and metalworking subreddits note that cordless grinders chew through batteries quickly under continuous load, so corded remains the pick for all-day grinding.