MotorVac CarbonClean Dual System MCS 352 - Manual (Page 11)

Batteries produce explosive gases and can explode.
Wear safety goggles when working on or near batteries.
Use in a well-ventilated area.
Keep sparks and flames away from the battery and never lay tools, equipment or other
conductive objects on the battery.
When tools or equipment is connected to the battery, make sure the equipment power switch
is off. Connect the positive lead of the equipment to the positive lead of the battery first;
connect the negative lead of the equipment to a solid ground point as far from the battery as
possible.
Keep battery acid away from skin or eyes. In case of eye contact, flush with clean water for 15
minutes and get medical attention.
Battery explosion and ignited gases can cause injury.