NavRoad RECO2 User Manual page 84

Device is delivered with battery partially charged. At first run it's recommended to fully
charge the battery with provided charger or optional dedicated AC charger. For technical
reasons, charging in temperatures below 0 C and above 35 C is limited.
If the operating time is shortened considerably, the battery should be replaced in the service.
Use only approved chargers. Approved chargers increase battery life and battery operation
time. Usage of other chargers may cause damage and/or warranty void.
Battery state indicator is in the lower left corner of the screen. When battery level drops to
about 5%, the message about recharging appears. Continuing operation without charging
the battery causes the device to switch off.