I'm running Windows 8 inside VMware Fusion on OS X; everything works fine, except as you can see below, I get no icon for the battery, i.e. Windows 8 doesn't know it's running on a laptop. That has recently become a problem because Windows 8 starts doing maintenance which drains the battery faster. Presumably if it knew it was running on battery it would postpone the maintenance.
How can I get Windows 8 to recognize the battery?