I just bought a Milwaukee 28V cordless grinder. The first time a went to use it to sharpen my mower blades, the battery died in about 3 or 4 minutes. I thought it just might have been that the battery was low to start. I finished with my corded Milwaukee grinder. Today I went to cut off a broken road sign and brought two fully charged batteries with me. Both lasted about 1 minute each. Does anyone have the Milwaukee 28V cordless grinder and if so, how long does your battery last? I'm thinking I have a problem with the grinder. It does not seem to have the speed as the corded grinder and both are 4 1/2 " grinders. Thanks in advance for any replies.
Curt.
Curt.