This weekend, I’ve added a new FAQ on moon phases, and a link to Klockit.com (a battery clock supply company). If you are mechanically inclined,
you might want to see if you could replace your battery clock movement. I would recommend that you remove your movement first, so you can match the hand shaft length, the type of minute hand (minute hands have either round holes or “I shaft”), and how it’s attached to the your clock case. Klocktit has over 100 different type of battery movements, so you will want to pay attention, especially if the hands are behind glass. You also might find that manufactures have many ingenious ways of attaching the movement to your clock. Best of luck!