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: Locking, Unlocking with Request Switch, Door Handle (With the advanced keyless
function)
All doors can be locked/unlocked by pressing the request switch on the front
doors while the key is being carried.
Front doors
To lock
To lock the doors , press the request switch and the hazard warning lights will
flash once.
A beep sound will be heard once.
To unlock
Driver's door requ ...
Mazda 6 Owners Manual: Selector cable adjustment
1. Remove the center console.
2. Shift the selector lever to P position.
3. Unlock the lock piece of the selector cable (selector lever side) in the
order shown in the figure.
4. Verify that the manual shaft is in P position.
5. Lock the lock piece of the selector cable (selector lever side) ...