Hi Castlepeak,
Thanks for contacting Apple Support Communities!
We understand that you're unable to charge your iPod shuffle to 100% and the charge only lasts a couple hours.
It's likely that the battery has been consumed. Apple may have discontinued service for the iPod. You can learn more here: Obtaining service for your Apple product after an expired warranty - Apple Support
"About obsolete products
Products are considered obsolete when Apple stopped distributing them for sale more than 7 years ago. Monster-branded Beats products are considered obsolete regardless of when they were purchased.
Apple discontinues all hardware service for obsolete products, with the sole exception of Mac laptops that are eligible for an additional battery-only repair period. Service providers cannot order parts for obsolete products.
Find out which products are obsolete:
Take care!