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: Radio Reception
AM characteristics
AM signals bend around such things as buildings or mountains and bounce off the
ionosphere.
Therefore, they can reach longer distances than FM signals.
Because of this, two stations may sometimes be picked up on the same frequency
at the same time.
FM characteristics
An ...
Mazda 6 Owners Manual: Dtc table
Note
Perform the following if the security light stays on:
- If gasoline engine stalls, go to symptom troubleshooting NO.11
ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK,
HESITATION/STUMBLE, SURGES in. (See NO.11 ENGINE STALLS/QUITS, ENGINE RUNS
ROUGH, MISSES, BUCK/J ...