Anywhere "completely safe"? No! Are some places safer then others, of course. Off flood plains, not near rivers, (if you live behind a levee you will be flooded, eventually) protected from bushfires, away from SLR, out of the tropical zone, not hot, not dry.
It's why I moved to Tasmania, on a small hill, 250m ASL on good soil, in a wet area, with zero bush fire risk.
Might be tricky to find, so if you want user replaceable batteries in a Mouse, maybe get a USB AA/AAA battery charger and use any of the many mice with AA (Or AAA) batteries. Recharge the batteries by plugging in the USB charger when they get low ?
My Logitech MX Master 3S is USB c rechargabke but not user replaceable batteries