Statistical Time Prediction, this is the most important feature of BatteryBar.

BatteryBar keeps historial data on your batteries as you use your laptop. That information is used to calculate a very accurate estimate of the time remaining on your laptop.

Windows reports a time remaining that's very simple and fluctuates wildly from moment to moment.

Discharging
When you're running on battery, BatteryBar shows the percentage bar in green, yellow, or red, depending on how much battery power is remaining. The bar displays the time left on your battery in Hours:Minutes

Charging
When charging, the percentage bar is shown in blue to indicate charging, and the estimated time to full charge is shown. The bar turns black and shows "On A/C" when fully charged.

Other Features
Vista style - The toolbar is using the same look and feel as the Vista taskbar buttons
Statistical time prediction - BatteryBar monitors your battery and keeps a history of how long it takes for your battery to charge and discharges. That information is used to more accurately predict the life of your battery
Translations - BatteryBar fully or partially supports 13 languages. Anyone may volunteer to translate BatteryBar to additional languages
Detailed Battery Info - BatteryBar is now capable of collecting detailed information about your battery, including max capacity (mW), current capacity (mW), charge rate (mW), discharge rate (mW), and more.
Automatic Update - BatteryBar will check for new versions at startup and automatically download the new version

CHG: The About window will now close after clicking the Upgrade button to bring up the Upgrade to Pro window.

CHG: Small translation changes for licensing errors

FIX: After an upgrade from a previous version, your existing Pro license key will now automatically activate with the new licensing system.

NEW: Custom sound files (PCM WAV) can be used for audio notification alerts

NEW: Beep the PC Speaker open for low, critical, and full battery states (each state beeps a different number of times)

NEW (Pro): If you try to activate a license key that was previously activated, you are now prompted to transfer the license key automatically

NEW: Added a log filesize limiter

CHG: Disabled accuracy correction when the battery drops below 15%. This fixes an issue with dual battery configurations where one battery stops at 10% while the other battery discharges.

CHG: Removed the height limit in BatteryBar; it will now fill the entire taskbar (e.g., in Windows 7)

FIX: When upgrading from v3.2 or older, the licensing system now properly validates the existing license key

FIX: An unexpected error in BatteryBar Solo/Floating Toolbar

FIX: A bug in the error logging that would cause a loop when logging certain errors

NEW: Estimate the discharge/charge rate for batteries that don't provide that information. The Popup Status will show "(Estimated)" next to the rate.
NEW (Pro): For time limited licenses, the About screen now shows the date your license will expire.
CHG (Pro): If there was an error changing the current power scheme, you'll see an error message.
FIX (Pro): The option to disable Statistical Time Remaining now works properly. When the option is disabled, the simple time remaining will be shown on the bar while the statistical time remaining will show in the status popup (for easy comparison).
FIX (Pro): Better error checking in the theming engine.
FIX (Pro): Better error handling when enumerating power schemes.
FIX: A few other minor fixes

NEW (Pro): Battery Profile Graph feature displays a graph of your battery profile data. This allows you to see exactly how your battery discharges and recharges. To access, right-click on BatteryBar and choose "Battery Profile Graph..."

NEW (Pro): Added option to automatically change power scheme when connecting or disconnecting external power.

NEW (Pro): Added option to disable Aero when on battery power or below a certain percentage level.

NEW (Pro): Added option to force battery discharge and recharge rate estimation.

NEW: Added a check to make sure that the floating toolbar and taskbar toolbar versions don't run at the same time.

NEW: Added a Windows 7 Small theme

CHG: Installer now restarts explorer during upgrades so that reboots aren't required after an upgrade.

CHG: Adjusted the default theme to add more space between the top and bottom of the theme and the taskbar.

FIX: Fixed an issue where the Trial Expired message would appear more than once.

FIX: When no estimated time remaining value is available, the raw time remaining value will be shown.

FIX: Time remaining will now show 0 minutes remaining when below the Soft Minimum value.

NEW (Pro): Battery Profile Graph feature displays a graph of your battery profile data. This allows you to see exactly how your battery discharges and recharges. To access, right-click on BatteryBar and choose "Battery Profile Graph..."
NEW (Pro): Added option to automatically change power scheme when connecting or disconnecting external power.
NEW (Pro): Added option to disable Aero when on battery power or below a certain percentage level.
NEW (Pro): Added option to force battery discharge and recharge rate estimation.
NEW: Added a check to make sure that the floating toolbar and taskbar toolbar versions don't run at the same time.
NEW: Added a Windows 7 Small theme
NEW: FullLifetime and Time Remaining will now use a simple calcuation based on the current discharge rate if no profile data is available
NEW: Installer checks if the taskbar or floating toolbar is installed and removes it if you're installing the other version
NEW: About window now shows the serial number and expiration for Pro users
CHG: For dual battery systems, BatteryBar will report the raw time remaining value for batteries that don't have any profile data
CHG: Installer now restarts explorer during upgrades so that reboots aren't required after an upgrade.
CHG: Adjusted the default theme to add more space between the top and bottom of the theme and the taskbar.
FIX: Status popup will show simple time remaining if no profile data is available
FIX: BatteryBar toolbar will no longer cause the XP classic taskbar to be bigger than normal
FIX: Adjustments to the installer to fix installation hangs
FIX: Prefereces - Low Minutes would always show 30 even if you set a lower value
FIX: Fixed an issue where the Trial Expired message would appear more than once.
FIX: Time remaining will now show 0 minutes remaining when below the Soft Minimum value.

The three fixes are:

1. Hide BatteryBar when battery is full - This should be working now and not cause a crash. Please let me know if it's working better than before
2. Alternate time/percent - Fixed
3. Change Power Scheme inverted - This should be fixed

FIX (Pro): Fixed a problem with the feature "Hide BatteryBar when battery is fully charged"

FIX (Pro): Fixed "Alternate time and percent" feature that got broken in 3.4.0

FIX (Pro): Fixed an issue with the Power Saving features to switch power scheme switching to the wrong power scheme

NEW: Clicking on BatteryBar now also shows the Discharge Rate in addition to Time Remaining and Percent Remaining

NEW: The installer is now unicode and includes translations for numerous languages. The installer will detect the current system language and display the text in that language if available

CHG: Battery Profile Graph now uses default system font to display the graph labels. Some systems had problems displaying Arial Regular font.

FIX: Resolved error in Preferences window when trying to select a custom sound if .NET Framework 2.0 SP1 wasn't installed

FIX (Pro): A licensing error could occur behind a firewall with selective domain blocking

FIX (Pro): Preferences - When selecting a custom font, only TrueType fonts can be used. An error message is displayed if a non-TrueType font is selected.

Translation Updates: Danish, Polish, Vietnamese, Chinese, Portuguese, Hungarian

NEW (Pro): Added new settings: "Information to Display on the Toolbar" to allow for any of the following to be displayed: Time Remaining, Percent Remaining, Discharge Rate, Capacity Remaining.

CHG: The "Alternate Time and Percent" setting now rotates the display through all the selected display options.

CHG: Removed "Show Time Remaining on Startup" due to change in information display setting. The software will now resume showing the last shown information.

FIX: If the taskbar is set to auto-hide, the popup status will popup above or next to the taskbar

FIX: When a power state change is detected (new battery, add/remove external power), the battery status is immediately queried. This fixes a regression introduced in 3.4.2.

FIX: Improved error handling when saving settings and profile XML files

FIX (Pro): Fixed a few minor issues with the Battery Profile Graph feature

FIX: Installer now waits for the taskbar restart to complete before attempting to turn on the toolbar