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: Power outside mirror inspection
1. Disconnect the power outside mirror connector.
2. Apply battery positive voltage to the power outside mirror terminals and
inspect the operation of the power outside mirror.
If not as specified, replace the power outside mirror.
3. Inspect for continuity between the power outside mi ...
Mazda 6 Owners Manual: Seat Belt Maintenance
1. Clean the soiled area by lightly dabbing it with a soft cloth soaked in a
mild detergent (approx. 5%) diluted with water.
2. Wipe off the remaining detergent using a cloth soaked in clean water and wrung
out well.
3. Before retracting seat belts which have been pulled out for cleaning, dry ...