Plus, it's waterproof up to 50m and has NFC for easy payments. Amazon offers six months of Fitbit Premium with the watch. The Fitbit Ace LTE is a new kids' fitness tracker from Fitbit. Our Fitbit ...

Fitbit received numerous reports of the lithium-ion batteries in the watches overheating during 2018 ... as well as online at ...

After consumer complaints of overheating batteries, the company did not immediately report the defect with its Ionic ...