LED Intelligent Rapid Charger 4 Slots QI 5W Output Power 1.2V AA AAA Ni-MH Ni-CD QC3.0 QC4.0 OLP ABS OTP
 
The red light is always on when charging, and it will not turn on or turn off when fully charged (the charger comes with overcharge protection function, the charging time is calculated according to time)