Is it normal for the battery to run really low in two days? Do the 2 blocks at the bottom of the semi circle mean a low battery?

Sometimes there is confusion between the progress meter and the low battery indicator.

The 2 blocks in the semi-circle are the progress meter of how many steps you have taken today in relation to your target number of steps for the day.

For instance by default the pedometer sets a target of 5000 steps per day, so those 2 bars will represent approximately 1000 steps.

If however you see a battery icon, it represents a low battery. You can see an example of the battery icon and the progress meter in the information below from the instructions.
If you do have a low battery icon and the pedometer is less than 30 days old, please contact us and we can arrange a replacement.