Without Using GR8-1291:

WARNING:

Keep all flames away from the battery, otherwise evaporated gas from the battery fluid may catch fire and cause serious injury.
Remove the battery filler caps when recharging to prevent battery deformation or damage.

CAUTION:

Do not quick charge for more than 30 min. Otherwise, it will damage the battery.

Remove the battery. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (VIN M)] .) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G (VIN Y)] .)
Remove the battery filler caps.

Courtesy of MAZDA MOTORS CORP.
Connect a battery charger to the battery and adjust the charging current as follows.
Battery slow charge current

55D23L (60 A-h/20HR): 4.5-5.5 A

75D23L (65 A.h/20HR): 5.0-6.0 A

80D26L (65 A.h/20HR): 5.5-6.5 A

95D31L (80 A.h/20HR): 6.5-8.0 A

Battery quick charge current [30 min]

55D23L (60 A.h/20HR): 30 A

75D23L (65 A.h/20HR): 35 A

80D26L (65 A.h/20HR): 35 A

95D31L (80 A.h/20HR): 40 A
After the battery is recharged, verify that the voltage is within the specification and remains at the same value for 1 h or more after the recharging has been completed.
- If not within specification, replace the battery.
Standard voltage

12.4 V or more