Before Charging:

Read the charger manufacturer's instructions.

Remove all jewelry and put on protective eyewear, gloves and work clothes.

Place the battery in a well-ventilated area since batteries emit explosive gasses.

Don't charge a frozen battery. Allow the battery to warm to above 32°F (0°C) before charging.

If applicable, remove the vent caps and check the battery's water level and, if low, add distilled water to cover the tops of the plates. Do not overfill.

To determine if the battery needs to be charged, test it with a hydrometer to determine its specific gravity and/or with a voltmeter to determine its state of charge.

If applicable, reinstall vent caps before charging.

While the charger is unplugged, connect the leads to the proper battery terminals. Note: For side-post and studded batteries, we recommend that you use adapters to insure adequate contact. For additional information regarding adapters, contact your local Interstate Batteries Distributor.

Set the charger to the proper settings for your battery, for example, 6-volts vs. 12-volts, low-maintenance vs. sealed, standard automotive vs. deep cycle.

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Plug in and turn on the charger.

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Do not wiggle the connections to check contact while the charger is turned on or plugged in.

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Choose the lowest amperage setting initially. Once the charger is on and the battery is charging, you may want to choose a higher amp setting to reduce charge time.

During Charging:

Keep the vent caps on.

Do not allow smoking, open flames or sparks near the battery.

Do not allow the battery to become overheated or hot to the touch.

Discontinue charge if battery bubbles or spews acid as this is a sign of overcharging or internal damage to battery.

After Charging

Immediately after the battery is fully charged, turn off and unplug the charger. Continuing to charge a fully charged battery may severely damage the internal plates and shorten battery life.

Disconnect the leads from the battery.

To assure battery is at a full state-of-charge use a hydrometer. 1.265 or higher will indicate a fully charged battery or use a voltmeter after the battery sits for 2-3 hours in a static state (no load or charging).