Always wear protective eyewear.
-When charging our batteries always use a charger specifically designed for gel or AGM.
-If the battery feels hot to the touch during charging- STOP.
-Connect the charger to the battery properly- The positive charger lead to the positive battery post- the negative charger lead to the negative battery post.
-Charging can give off hydrogen and oxygen which explode if ignited. No smoking, sparks or flames are to be around batteries while charging.