Individual battery slots: Ultra compatible 1-4 AA/AAA/C/D and 1-2 9V Ni-MH/Ni-Cd rechargeable batteries, independent charging slots, charge different size batteries.
Fast Charging Speed than Other Name-brand: 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.
Safety guide: Will stop stop charging when senses improper input voltage, defective or with non rechargeable batteries.
Constant Charging Mode: Protects the batteries against current fluctuation.