Best answer: According to Fitbit, the AA batteries that come with your Aria 2 should last for about a year.

Amazon: Fitbit Aria 2 ($129)

That batteries that come with the Fitbit Aria 2 should offer one year of power

The Fitbit Aria 2 utilizes three 1.5V AA batteries, and while Fitbit says that most Aria 2 owners should get a year out of them, the company acknowledges that this time could vary based on a few factors, such as how often you use the scale. Note that whenever the battery life runs low on the Aria 2, it will provide you with an alert on its display.

Wi-Fi is also an important factor. The Aria 2 can connect to your home Wi-Fi network, and depending on where the scale is placed in your home relative to the closest Wi-Fi signal, the Aria 2 might expend more power maintaining a connection.

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What about replacements?

When it comes time to replace the batteries in your Fitbit Aria 2, you'll need, as stated above, three AA batteries. While they don't necessarily need to be 1.5V, it's best if they are if not higher, as lower-voltage batteries won't last as long as those with the proper voltage.

You shouldn't need to worry about battery life for this scale

With an expected battery life of about a year, you shouldn't need to worry about the battery life of your Fitbit Aria 2. Just make sure to have some AA batteries handy for when the time to change them does arrive.

Our pick

Fitbit Aria 2

Long-lasting batteries on an excellent scale.

The Fitbit Aria 2 should see its batteries last around a year, and replacement just requires a few AAs.

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