BatteryBar by Osiris Development were around for quite a while now, so this isn't entirely new. But if you frequently find yourself in situations with your computer without it always being plugged in then it does you good to know about BatteryBar. Fortunately, there's not much to know other than the fact that it gives you a better battery monitor than the Windows default.
The way it works is quite neat. To start, you first install the free version of BatteryBar on your PC. Then you simply configure it according to your preferences and click "dash". It will then show you your battery level, percentage charge left, the percentage charge remaining, the percentage of full charge and the time it took to finish charging your battery to full capacity.
You can also use the Windows program BatteryBarPro as an alternative to the free version. This program comes with a variety of useful features and functions including battery status monitoring, PC speed and performance reporting, battery alarm notification, system and device detection, customized battery monitoring, etc. BatteryBar Pro is also quite easy to use and its advanced features are really useful for those who want to keep track of their PC performance. Although both programs are excellent, I would personally recommend BatteryBar as it has more features and has been designed specifically for people who use windows as their PC of choice.