Harbor Freight Tools 92775 operating instructions SKU For technical questions, please call

1.Charging Current Selector (1): The Charging Current Selector is used for selecting a charging current of either 0.25 AMPs, 0.50 AMPs, or 0.90 AMPs depending upon the 12 volt battery that is to be charged. Use a digital voltmeter (not included) to determine the voltage of the battery. Check the battery manufacturer’s recommended charging current. Then, set the Charging Current Selector to the appropriate Amperage. (See Figure D.)

2.Power On (2): When illuminated, the Power On feature indicates the Battery Charger is on and ready for use. (See Figure D.)

3.Battery Charging (3): After properly connecting the Charger Clamps to the battery, selecting the correct charging current, and turning on the Batter Charger, the Battery Charging feature will illuminate indicating proper functioning of the Battery Charger. If the Battery Charging feature does not illuminate, the voltage of the battery is below 9 volts, and the battery will not charge. (See Figure D.)

4.Battery Charged (4): When illuminated, the Battery Charged feature indicates the battery is fully charged and may then be disconnected from the Battery Charger. (See Figure D.)

5.Low Battery (5): When illuminated, the Low Battery feature indicates the battery connected will not be charged as its voltage is below 9 volts. The battery should be recycled according to local guidelines. (See Figure D.)

6.Power Switch (6): Always properly connect the Charger Clamps to the battery, and select the correct charging current before turning the Power Switch to its “ON” position. Once the battery(s) is charged, turn the Power Switch to its “OFF” position. Then disconnect the Charger Clamps, and remove the battery(s). (See Figure D.)

7.Charger Clamps: Never allow the Red and Black Charger Clamps to touch each other or the same metal object. Always connect the Black Charger Clamp of the Charger to the negative (--)terminal on the battery. Always connect the Red Charger Clamp of the Charger to the positive (+) terminal on the battery. When connecting the Charger Clamps to the terminals on a battery, always connect the Red Charger Clamp first, then connect the Black Charger Clamp. When disconnecting the Charger Clamps, always disconnect the Black Charger Clamp first, then disconnect the Red Charger Clamp. Make all Charger Clamp connections before plugging the Charger’s Power Cord Plug into a 120 volt, grounded, electrical outlet and turning on the Power Switch.

8.Internal 12 Volt Relay (8): The Battery Charger features an internal 12 Volt Relay to protect the Battery Charger from a short circuit and reverse polarity. The 12 Volt Relay will not connect the battery to the Battery Charger unless the battery voltage is more than 9 volts and connected to the proper polarity.

SKU 92775 For technical questions, please call 1-800-444-3353 PAGE 10