Google's new budget-friendly thermostat hopes to attract different types of first-time smart home buyers by offering it in four different shades—Fog (mint), Sand (salmon), Charcoal (black), and Snow (White). One extra design touch it added is that the Nest Thermostat's included batteries match the units themselves. It doesn't add to the experience, but it's a nice aesthetic touch. Most variants match their exterior, except for the Charcoal, which gets the similar white AAAs as the Snow model.
While the Nest Thermostat uses HVAC system wires as its primary power source, it has provision for two AAA 1.5V alkaline batteries. This isn't the first time Google colour-matched its smart home devices. The new Chromecast with Google TV has the same colour-matching batteries, too.
Source: 9to5Google