I have been using these for about a year now: https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=220943
But this would also be fine: https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&productId=2289175 From: Patrick McDougal Sent: Friday, November 19, 2021 8:59 PM To: m100@lists.bitchin100.com Subject: [M100] Replacement Power Supply To all, Thanks for the previous advice about the replacement backup battery. I received the replacement and successfully replaced. Now, I am looking for an AC power supply. Has anyone identified a good after market replacement or am I better off finding a 6v adapter and rewiring for the unusual negative center. Thanks, Patrick