Introduction
This guide will illustrate for you how to replace the battery from a Sanyo Katana Eclipse X.
Tools
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            Press the battery release button located on the back of the phone. 
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            With the button depressed, pull down on the battery protector to remove it from the phone. 
 
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            Slide a thin object under the white tab located on the bottom of the battery and carefully lift away from the phone. 
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            The battery should now be free of the phone. 
 
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            Align the copper receptors on the back of your battery so the phone's copper receptors are touching the battery terminals. 
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            Using your thumb, apply gentle pressure to the battery until it clicks into place. 
 
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            Take the phone’s back casing and set it over the battery. 
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            Apply gentle pressure, pushing towards the top of the phone until your hear a click. 
 
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To reassemble your device, follow these instructions in reverse order.