Portable 18650 Battery Spot Welding and Polishing Tool Diamond Grinding Head Handheld Grinder (Accessories Sold Separately)

Instructions for use of special sleeve for electric hand drill: when using the red corundum pink grinding head for the first time, the grinding head may not be in full contact with the battery surface, and the grinding effect may not be ideal. after using it many times or taking out the grinding head and installing it on the electric hand drill to find the cement floor (or rough area) and polish it flat, it can achieve the best performance. note that this sleeve can only be used with lithium electric hand drills. other equipment such as grinding machines cannot be used, otherwise the sleeve and grinding head will be damaged, and you will be responsible for the consequences. this grinding head can only grind the residual solder joints of the disassembled nickel strip, and cannot grind the solder joints. forced grinding will cause the solder to fill the gaps in the grinding head, making the grinding head smooth