Here is a typical discharge graph which illustrates what you are seeing:
The bars on any LCD are just an indication and should be taken with a very large grain of salt. The only way to know how much a battery will give you is to run it flat, preferably on one of your regular routes. Then you will know where you are at by looking at the distance you have covered since the last full charge.
To that you can factor in temperature difference, head or tail wind, your fitness at the time of the ride...
The bars on any LCD are just an indication and should be taken with a very large grain of salt. The only way to know how much a battery will give you is to run it flat, preferably on one of your regular routes. Then you will know where you are at by looking at the distance you have covered since the last full charge.
To that you can factor in temperature difference, head or tail wind, your fitness at the time of the ride...