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: Stabilizer control link inspection
1. Remove the stabilizer control link from the vehicle.
2. Inspect for bending and damage.
3. Measure the ball joint starting torque.
(1) Rock the ball joint stud side to side 10 times.
(2) Rotate the ball joint stud 10 times.
(3) Measure the starting torque using a suitable allen so ...
Mazda 6 Owners Manual: Sunroof motor inspection
Motor
1. Remove the sunroof motor.
2. Apply battery positive voltage to the sunroof motor terminals and inspect
the operation of the sunroof motor.
If not as specified, replace the sunroof motor.
Limit Switch
1. Remove the headliner. (See HEADLINER REMOVAL/INSTALLATION.)
2. Verify t ...