About my batter. See below. Does this mean that the battery life is low. on 2008 Toyota Sienna

In the last four months I have had to get a boost because I could not get started. Once I received the boost it started immediatly.I just checked the battery and the water level was very low but not cmpletely out. I added water to bring the level up.

Asked by for the 2008 Toyota Sienna
2008 battery? maybe time for new one?