This HYCHIKA angle grinder is a bargain. Right out of the box, it looks like a quality meat grinder. Nothing feels flimsy or cheap. The charger is very similar to Dewalt charger or Makita charger, the quality seems good. The battery charges in a very reasonable time, I didn't have to wait all day, an indicator light lets you know when the cell is fully charged. The extra pads and discs that come with it work very well, nothing strays. I've used a grinder to cut a lot of metal of different thicknesses and it's great, if you apply normal pressure it cuts great. I removed the top cover to reveal the gearbox and applied lithium grease, just an extra coat for better performance. The battery lasts me several days of work, I have removed paint from metal, cut metal, sanded various parts and I have had a long battery life. I'm sure this item is mass produced and the key is to get one that works properly. If you are unlucky enough to receive a broken coffee grinder, simply send it back free of charge and get a new one. Makita, Milwaukee, Dewalt and Handwerker can also have their problems. Send it back for free. The only problem is that HYCHIKA has to offer replacement batteries. I would like an extra one as a backup. Enjoy!