I have a ACR ResQlink+ PLB-375 and a ACR GlobalFixiPro EPIRB, model RLB-36 where the batteries have expired. I called an authorized dealer from the ACR website and they require the units to be sent in and charge $150 for the PLB and $300 for the EPIRB. Ouch! Do I need to send these in to an authorized dealer, or is it ok to use independent companies? I came across an outfit named Beacon Battery Replacement where you can buy the batteries ($90 for the EPIRB) and they even have instructions on their website on how to change the batteries yourself. Does anyone have suggestions on where to send these in to get the batteries replaced? Any experience with Beacon Battery Replacement? Should I try and replace the batteries myself or is it better to stick with an authorized dealer? Thanks for your help!!