some people mentioned 8 batteries....but they meant 4 per mill. Overall I am impressed. works great, a little hesitation now and then but overall it has definitely taken the labor out of grinding pepper, especially for me who uses a fair amount through the day in preparation of lunches to go and dinner...and yes we love pepper! For the price I am REALLY impressed, and will likely buy more to give to family members. I am a semi pro chef and definitely recommend this.