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: General procedures
PRECAUTION (BRAKES)
Wheels and Tires Removal/Installation
1. The removal and installation procedures for the wheels and tires are not
mentioned in this section. When a
wheel is removed, tighten it to 88-118 N·m {9.0-12.0 kgf·m, 65.0-87.0 ft·lbf}.
Brake Lines Disconnection/Connection
Cautio ...
Mazda 6 Owners Manual: TCS/DSC Indicator Light
This indicator light stays on for a few seconds when the ignition is switched
ON. If the TCS or DSC is operating, the indicator light flashes.
If the light stays on, the TCS, DSC or the brake assist system may have a malfunction
and they may not operate correctly. Take your vehicle to an Auth ...