Update 1.4 was only needed for OS 10.4 and 10.5. It was included in the OS after that.
Do you have any reference to confirm this battery firmware updater is included in newer OS? About Battery Updater 1.4 implies that the Pack Lot Code will change from 2 to 3 after the battery firmware is updated: "If the Pack Lot Code is 0003, the update is not necessary or has already been applied."
http://support.apple.com/kb/HT3421
I have Lion with this battery. Pack Lot Code shows 2, which indicates it needs the update.
Model Information:
Manufacturer: DP
Device Name: ASMB016
Pack Lot Code: 2
PCB Lot Code: 0
Firmware Version: 110
Hardware Revision: 500
Cell Revision: 200
Charge Information:
Charge Remaining (mAh): 2658
Fully Charged: No
Charging: No
Full Charge Capacity (mAh): 4875
Health Information:
Cycle Count: 20
Condition: Normal
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 11735