Genuine Toshiba owner's manual. Couldn't really ask for more. And written in understandable English in contrast to a few recent experiences I have had with manuals for other equipment other than Toshiba but made in China and written in "Chinglish"!
Text excerpt from page 33 (click to view)
Checking the Battery Level
You can check the battery level in the Power Management properties dialog box in the Control Panel or double-clicking the battery or AC plug icon on the taskbar. You can also check with the battery indicator on the front side of the computer.
Press the button on the right of the battery indicator to show the battery power remaining. Refer to the table below.
Battery Indicator Status All on Three on Two on One on One blinking All off Capacity Remaining 76% -100% 51% - 75% 26% - 50% 1% - 25% Nearly 0%(Empty) 0%(Empty)
This battery indicator turns on automatically while the battery is being charged (when connected to AC power). When the battery is fully charged, the battery indicator turns off. The battery power remaining is an approximate figure. The remaining operating time expected may be different from the actual remaining time, depending on the use of the computer. If the actual remaining power in your battery is less than what the battery indicator lights suggest, you should initialize the battery pack as per the procedure on page 3-3.