The batteries are rechargeable:
Maven Home station - use the included USB-C cable to connect it to the charging adapter, and then plug the adapter into a socket. Keep in mind that the Maven Home station needs to be permanently on in order to work.
Maven Collar sensor - connect the sensor to the charging adapter using the included mini-USB cable. Make sure the charging adapter is plugged into a socket. The sensor should start to recharge right away - when its LED turns solid green, it means it is fully charged.
Please do not open either the Maven Home or the Maven Collar sensor, otherwise the warranty will be voided. In case you need help with your Maven kit, please contact us.
Have a great day!