You can find the torx security T5 on Amazon in this kit with brand VMAN. Once opened, you can use a heat gun to melt the glue covering the red and black leads to the battery. After that, you can test using multimeter, set to measure around 3-5 volts. You will see it reading close to zero. Desolder the black and red batter leads to the unit. Use a stripped 5 volt wall charger and connect the ends with alligator clips. Alligator black wire to black battery lead. Alligator red wire to battery red lead. Plug and unplug the wall charger at 1-2 second intervals. Do this 5-10 times to wake up battery. Unplug wall charger. Use multimeter to test battery voltage. It should now read 3 volts or so. Now, solder battery leads back to their respective spots. Plus usb into unit to charge and you will see the case charging again. Drop some glue on top on the solder joints to insulate. Screw the T5 back into their slots and you have just fixed the dead case issue. This applies to most earbud cases, unless the battery is...

Remove versa Fitbit app, unpair Bluetooth. Then add Versa back to app.