Smart home companies have been selling you the worst battery format on purpose
My Ring alarm system covers 11 doors and windows. Every second-gen contact sensor runs on two CR2032 coin cells. The Ring Alarm Panic Button takes two more. The first-gen flood sensor uses a CR123A. The outdoor cameras run on Ring’s proprietary rechargeable pack. That’s four different battery formats inside one brand—and I haven’t even counted the Philips Hue motion sensors eating AA batteries in the upstairs hallway. This isn’t a coincidence or the result of engineers solving different problems independently. It’s a pattern, and it costs you money. Understanding why smart home reliability suffers starts with the hardware sitting in the wall right now. Every device uses different batteries The format zoo hiding in your smart home Ring alone spans CR2032 cells for contact sensors, two AA batteries for the outdoor contact sensor, CR123A for first-gen accessories, and proprietary lithium packs for its cameras. That’s one brand. Add a Schlage or Yale smart lock and you’re looking at four AA batteries. Philips Hue’s indoor motion sensor takes two AAs. Zigbee contact sensors from third-party brands …








