Mazda CX-52017 Owner's Manual page 479

Keep flames and sparks away from open battery cells and do not allow metal tools to
contact the positive ( ) or negative ( ) terminal of the battery when working near a battery.
Do not allow the positive ( ) terminal to contact the vehicle body:
Flames and sparks near open battery cells are dangerous. Hydrogen gas, produced during
normal battery operation, could ignite and cause the battery to explode. An exploding battery
can cause serious burns and injuries. Keep all flames including cigarettes and sparks away
from open battery cells.
Keep all flames, including cigarettes, and sparks away from open battery cells:
Flames and sparks near open battery cells are dangerous. Hydrogen gas, produced during
normal battery operation, could ignite and cause the battery to explode. An exploding battery
can cause serious burns and injuries.
NOTE
Before performing battery maintenance, remove the battery cover.
Maintenance and Care
Owner Maintenance
6-35