The Smart Battery installation only support Windows XP 32 bit, Windows Vista 32 and 64 bit only. At this writing, Windows 7 is not supported yet (I confirmed for 64 bit version is not supported).
Smart Battery hardware can be identified by ACPI\CPL0002 (Compal Embedded System) id. The latest driver is version 126.96.36.199.
First, install the Smart Battery software. After the installation, the driver for the above hardware is still unknown.
Next, open Device Manager and locate the hardware and choose to update the driver. Do not use automatically search for driver, instead browse the driver at My Computer. Select C:\ProgramData\Vista64 for the driver location. Subtitutes C: with your SystemDrive and the Smart Battery can work under Windows 7.
If you’re using the 32 bit version of Windows 7, The Smart Battery driver is located at C:\ProgramData\Vista32.
Update Aug 12, 2013:
Tested working on Windows 8 x64.