A low level of electrolyte fluid will cause the battery to discharge quickly.

Inspect the electrolyte level at least once a week. If it is low, remove the caps and add enough distilled water to bring the level between the upper and lower level (illustration).
Do not overfill.
Examine the specific gravity of the electrolyte with a hydrometer, especially during cold weather. If it is low, recharge the battery.
Battery Maintenance
Battery RechargingMazda 6 Owners Manual: Installing Child-Restraint Systems
Accident statistics reveal that a child is safer in the rear seat. The front
passenger's seat is clearly the worst choice for any child under 12, and with rear-facing
childrestraint systems it is clearly unsafe due to air bags.
NOTE
Even if your vehicle is equipped with front passenger occupan ...
Mazda 6 Owners Manual: Drive shaft removal/installation
Caution
Performing the following procedures without first removing the ABS
wheel-speed sensor may possibly cause an open circuit in the harness if it
is pulled by mistake. Before performing the following procedures, remove the
ABS wheel-speed sensor (axle side) and fix it to an appropri ...