9Connecting to an External Battery

9.1 Extended Operating Time

Much longer battery operating time is possible when connecting Portable Power 250 to a larger external battery. For example, an external 60 amp-hour battery will give approximately 3 to 4 times the operating time of Portable Power 250’s internal battery.

WARNING: Use a sealed, non-spillable battery for indoor

use. Common auto and marine batteries are not suitable for indoor use unless their fumes are vented outdoors. They contain acid, which is hazardous if spilled. Wear eye protection and protective clothing when connecting Portable Power 250 to an external battery.

9.2Connecting an External Battery

The external battery is connected using the Jump-Start Cables as follows:

1.Connect the Jump-Start Cables to the Jumper Cable Port on the left side of Portable Power 250.

2.Connect the red positive (+) clip at the end of the Jump- Start Cables to the positive (+) terminal of the external battery.

3.Connect the black negative (-) clip at the end of the Jump- Start Cables to the negative (-) terminal of the external battery.

4.If the positive and negative clips are properly connected, the green Battery Clips Correct light will illuminate. If the clips are not properly connected the Reverse Polarity Alarm will sound and the red Battery Clips Incorrect light will illuminate. Remove both clips to cancel the alarm and repeat steps 2 and 3.

5.When the external battery is discharged or no longer needed, remove the red clip first, then remove the black clip before recharging Portable Power 250.

WARNING: Do not remove the Jump-Start Cables from

the Jumper Cable Port when the positive and negative clips are connected to the terminals of the external battery. This will disable the jump-start safety feature and could result in sparking and explosion.

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