Introduction
Use this guide to replace a dead or faulty battery. No difficult steps or tools are required for this process. The PowerShot Pro1 requires a lithium ion battery pack. It can use four kinds of lithium ion batteries: BP-511A, BP-511, BP-512, or BP-514.
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            Locate the battery compartment cover on the right hand side of the camera. The cover features the text: “CF/BATT.OPEN”. 
 
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            There is an arrow beside the text. Using your hands, slide the cover in the direction of this arrow. 
 
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            Pull the cover toward you. After doing so you will see the battery sitting inside the compartment. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.