When charging batteries

1. Before operating the charger make sure to read and understand the instructions that come with the charger. Never attempt to charge a battery without first reviewing and understanding the instructions for the charger being used.
2. Always charge batteries in a well ventilated area.
3. Always wear protective for your eyes.
4. Never charge a visibly damaged battery.
5. Never charge a frozen battery.
6. Connect the charger leads to the battery; red (+) positive lead to the positive (+) terminal of the battery and the black (-) negative lead to the negative (-) terminal. If the battery is still in the vehicle connect the negative lead to the engine block to serve as a ground. If the vehicle is positive grounded, connect the positive lead to the engine block. To be absolutely positive make sure that the battery is completely disconnected from the equipment and hook the charger leads up accordingly.
7. Make sure that the charger lead - both at the charger and the battery side of the leads - connections are tight.
8. If the charger has a battery type selector switch (I.E. Flooded, Gel, or AGM), set it to the proper location.
9. Set the timer if it is available and turn the charger on.
10. If the battery becomes hot or if violent gassing or spewing of electrolyte - in the case of flooded battery types - occurs, reduce the charge rate or temporarily halt the charger. If after you restart the charger and/or reduce the charge rate these events repeat themselves take the battery to a professional to be evaluated.
11. Always turn the charger OFF before removing the leads from the battery to avoid dangerous sparks.