Independent charging slots can charge different compatible batteries freely.
For Ni-MH Ni-CD rechargeable batteries: 1/2/3/4 pieces AA, AAA, C, D, and 1/2 pieces 9V batteries.

Automatically stop charging when detecting improper input voltage, defective or short circuit or non rechargeable batteries.

Protect the batteries against current fluctuation and keep using the charger safely. Note: Please ensure the battery installed is correct: make the +/- pole of the battery is match for the +/- pole of the device.

Charging the battery 2-4Pcs AA/AAA/C/D with the total current 2A. Less than 3 hours to fully charged the AA/AAA/C/D batteries, and less than 10 hours to fully charged the 9V batteries.

Charging Time Table:
1pcs Battery Type (Ni-MH) Capacity Charging Time (approx)
AAA 500-1200mAh 0.5-1.2hours
AA 1300-2800mAh 1.3-2.8 hours
C 1800-5000mAh 1.8-5 hours
D 1800-10000mAh 1.8-10 hours
9V 150-600mAh 2.5-10 hours