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: Curtain Air Bags
The curtain air bags are mounted in the front and rear window pillars, and the
roof edge along both sides.
When the air bag crash sensors detect a side impact of greater than moderate
force, the curtain air bag inflates quickly and helps to reduce injury mainly to
the rear outboard passenger' ...
Mazda 6 Owners Manual: Customer Assistance (Mexico)
Your complete and permanent satisfaction is our business. We are here to serve
you. All Authorized Mazda Dealers have the knowledge and the tools to keep your
Mazda vehicle in top condition.
If you have any questions or recommendations for improvement regarding the service
of your Mazda vehic ...