With coconutBattery, you're always aware of your current battery health. It shows you live information about your battery such as how often it was charged and how is the current maximum capacity in relation to the original capacity your battery had when it left the factory.
Of course you are able to save the current maximum capacity of your battery. So you can see the changes of your battery health over time.
coconutBattery is and will always be freeware. If you like it, a donation is always very welcome.