Most batteries don't come fully-charged when you buy them. This maybe the situation, which should mend itself as soon as the battery gets charged from driving, or from manual charging. How long has the light been on since you installed it? My wife's "tire-pressure" light came on; I found a rock had punctured the tire. After having it booted, the light stayed on quite a while...it concerned me, but finally went off before I pulled into the house! Good thing!