In system scheme of NB power, SMD Fuse can be used to realize overcurrent protection for AC adapter in 19Vdc DC output of input power and battery in 12 Vdc DC input power.

SMD Fuse can realize safe fusing without arcing and spark so as to avoid safety risk.
SART Fuse recommends adopting: S1206-F Series, 1.0~7.0A fuse

                            S6125-F series, 1.0~20.0A fuse