I bought my Fitbit Blaze (remember those?) in 2016. Battery is on its last legs. I will be heartbroken when it's time to retire this bad boy. : r/ fitbit
Blaze not holding charge - Fitbit Community
Fitbit Blaze Troubleshooting - iFixit
Fitbit Blaze Battery Replacement Bad Battery - YouTube
Solved: Blaze not charging - Fitbit Community
Blaze Not Holding a Charge FIX! - Fitbit Community