Is this a new Spark and is that the battery that came with it? A new battery will last 6-12 months depending on usage. However, we put batteries in the Spark at the factory, so you don't have to install one when you receive your Spark. So sometimes between the factory and your receipt of the Spark, your battery will arrive already used a bit. Things happen like the Spark shaking during shipping, which has the Spark track movement and light its lights. This is a big reason we provide you a 2nd unused battery with your Spark. When you use a brand new battery, it should last much longer than the one that was already put in at the factory.
I hope this explanation helps. Enjoy your Spark!