Before using the battery, check that it has a sufficient charge. The battery is equipped with a gauge to indicate the level of battery charge (25-100%). To check the level of charge of the battery, press the button on the battery’s keypad. The battery gauge/indicator(s) LEDs to the left of the button illuminate to indicate the level of battery charge (25-100%).
Connect the switch end of the battery cord into the Focus unit’s power inlet only. Connect the other end into the battery. Do not force the cords, as they can be properly inserted only one way. Use the switch on the chord to turn on and off them machine.