Celllink Neo is the secondary battery for the black box. Secondary Battery for Black Box Cellink. ======================================= It is an application for using Celllink's Bluetooth control system. It contains cellink operation status, capacity, temperature display or some control functions. Display contents 1. Connected device (connected model) 2. Battery capacity (%) 3. Battery status (charge / discharge status) 4. Charge / discharge time 5. Battery temperature (℃) 6. Input / output