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Introduction
This guide will teach youshows an easy step-by-step process on how to remove and replace the battery to theof a CASIO fx-300ES Scientific calculator.A low battery is determined by a dim display, if the contrast is altered, or figures fail to appear right when the calculator is turned on. A battery can cause leakage if dead which causes malfunction. The battery life is approximately three years based on the usage of one hour per day and once that is exceeded the battery dies. Be sure to note the orientation of the battery for when a new one is being put in.