MiniBatteryStatus is a small Dashboard widget that monitors battery status, charge percentage and remaining battery life. Integrated with Growl to alert you when it's time to recharge your battery.

The widget assumes different colors depending on the remaining charge of the battery. It is also aware of battery charging and plugged status. User can choose if the widget should display percentage, remaining time, capacity (current/maximum) and cycle count or just the charge gauge.

Features:

Growl integration.
Be aware of what happens to your battery even when you’re not looking at Dashboard. MiniBatteryStatus tells you when it’s time to recharge your battery, when you’re done charging and when the power source has changed with Growl notifications.

Lots of colors.
Thanks to the revolutionary “arcoiris” engine, the widget color varies with continuity from green to red. Enjoy a plenty of awesome nuances from acid green to coral red.

Small widget size to save Dashboard real estate.
iBooks and powerbooks have limited desktop surface. Leave room to other cumbersome widgets, still monitoring your battery with style and no clutter.

Rewritten from ground up.
Completely event driven. Same data from the system status item, instantaneous notifications.

Share battery data.
The included battery data sharing service will make your battery remotely monitorable by MiniBatteryLogger. System administrators will be able to monitor the available energy supply of all laptops over the local network.

Requirements:
OS X 10.4-10.6
Universal Binary