[. . . ] 2 Hour Charger Instruction Manual Model No. : CH-3988R This Charger designed to charge 2 or 4 AA or AAA size rechargeable batteries for home or travel. Please note that this charger must not be used for Alkaline, Carbon Zinc, Lithium or any kind of battery other than Ni-MH. [. . . ] 2 or 4 batteries can be charged at any one time DC car cord are available Foldable US Plug. voltage cut off function Safety timer cut off function Power On (default mode) Charging (when batteries are inserted correctly) Fully Charged Alkaline Power off NoteUnder fully charged status, the charger is in trickle mode but the batteries are ready for use and could be taken out. The charger will not supply charging current under default mode, the default mode is due to the below cases: ANo battery put inside charger, or the "2/4" optional button is not in correct position. End of Charging: 1. When the red LED is solid and the green LED is blinking, it indicates the batteries are fully charged, and the batteries could be taken out and are ready to use. Note: proposed working temperature for charger: 20-25. Usage Instructions: Step 1. Load batteries into charger and select button 1. It can charge 2 or 4 pcs of AA/AAA NiMH rechargeable batteries. 2. Put battery in the charger as per the"+" "-" indication. 3. If you want to charger 4 pcs AA/AAA batteries, put 4 pcs battery in charger and slide the battery number button to the "4" position. (Fig. 1) Important Safety Instructions: 1. This charger is designed for indoor use only, do not expose to damp or rain. This charger is intended to charge AA/AAA Nickel-metal-hydride(Ni-MH) battery only. [. . . ] Unplug the charger from outlet before attempting any maintenance of cleaning. 4. Fig 1 4. If your want to charge 2 batteries, put 2 pcs batteries in the left two compartments and slide the battery number button to the "2" position. (Fig. 2) 8. 9. Fig 2 Step 2. [. . . ]