For a typical normal use, the remote lasts four months or longer on a single charge. You can check the remote's battery level by doing the following...
Caavo button> Settings> Remote
When the battery starts getting low, you will be prompted at the bottom of your screen when you turn on your Caavo. That is the indication to plug a USB charger into your Caavo remote. The usb input can be found along the bottom side edge of the remote.
The battery takes approximately 2-3 hours to fully charge. You can actively use the remote to control Caavo while the battery is connected to the charger and charging.