Sense won't charge

[CharynF]

Sense will not charge. Charger is fine. Typical after 2 years and warranty expired it died. This is my second one that died after 2 years! I need to find my serial number to hopefully use warranty. Can I find that in the app?

Moderator Edit: Clarified subject

[Odyssey13]

Hi @CharynF the serial number is supposed to be on the box. You get with customer support?

when there is someone available, chat is an option. Phone or Twitter works well, too.

https://myhelp.fitbit.com/s/support?language=en_US 

Support is limited by the number of representatives available at a given time and the hours of operation. Chat lines are open when they have live help.
USA: call (877) 623-4997
UK: call 0800 069 8505
INDIA: call 000 800 050 1057
IRELAND: call 01 691 7502 (country prefix: +353)
Other contact options:

USA: click

Canada: click for options