Bests & Worsts Reviews from Amazon

I started receiving my shipments back stating that postage was due. I reweighed everything and it all looked good. So I took my packages to the post office. They weighed them and said they were 1-2 ounces more than what this scale told me. So I tested this scale with a lightweight item. I weighed my cell phone on my little 13 oz. postage stamp scale = 5.5 oz. My cell phone at the post office - 5.5 oz. My cell phone on this scale = 4.6 oz.