I have bought both over he years. The Makita last a few years, but for the price, AM ones will do you 12 months, but... With tha AM ones, it is hit and miss. I buy 4 at a time, and 2 only last a month. I have gone back to buying Genuine, at the hardware as I am a roofer and use mine hard, every day. However for a home person who has their tools in the shed, I would buy the cheaper ones, as the Makita ones may die through lack of use.