A:Answer Hi Daniel!
Thank you for reaching out to us. We appreciate your interest in knowing the battery life and size of the Galaxy SmartTag. To answer your question, SmartTag uses a CR2032 battery, a small lithium battery shaped like a coin. It’s the same kind of battery that is usually used in wristwatches. In other words, you don’t need to charge it. Depending on your usage and other factors, CR2032 batteries can last about a year, so you won’t have to worry about replacing them for a while.
For more information, you may access this link: https://www.samsung.com/us/support/answer/ANS00088244/.
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Reference #: 1144250285
Have a great day.
Melardo