@fasteddywilson, edmund, Normally the battery door assy would be replaced as it will have the contacts molded into it I believe. Below is a guide that will show how to disassemble camera to access battery door hinge pin to enable changing of battery door. Also a couple links to replacement battery door assy. which you can also do a search on for better pricing perhaps. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
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http://www.procamerarepair.com/CANON-POWERSHOT-A620-BATTERY-DOOR_p_2922.html
http://www.ebay.com/itm/GENUINE-CANON-A620-BATTERY-DOOR-WITH-PIN-amp-SPRING-DIGITAL-CAMERA-PARTS-REPAIR-/252063573690
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