![ck360-easy-check-reads-button-battery-voltage-capacity-02](https://blog.uobdii.com/wp-content/uploads/2019/05/ck360-easy-check-reads-button-battery-voltage-capacity-02-326x226.jpg)
CK300 Easy Check detect remote key frequency, key type & ID, voltage
To judge if the button battery good or not, you can use a tool to read out the voltage and better this tool can display the battery power is fully charged or not, this tool must be CK360 Easy Check.