Battery management may seem daunting and tricky. It isn't, but there is a bit of a learning curve. Hang in there! It is really worth the effort. Get a cheap multimeter and learn how to read the voltage of your battery. (It is easy!) Monitor it carefully, at first, until you get a feel for how your usage pattern affects the battery.
One key tip -- let the battery rest for at least 15 min before taking a reading. The reading you get while the battery is being used is artificially low. Once it rests a bit, the reading will reflect the true state of affairs.