My doorbell pro is going dead extremely fast

i thought a full charge was suppose to keep it charged for close to 6 months. i went from a full charge to 53% in less than 2 weeks. i’ve turned the sensitivities down, i’ve adjusted the detection zone, and even turned on the battery saving mode. when i very first got the the doorbell it had a 47% battery life on it and i charged it to i think 88% and that charge went down tremendously within a week. i thought it went dead so fast because all my settings were turned up to maximum and i didn’t have battery saving mode on but now that i’ve adjusted everything and charged it till full it’s still going dead pretty fast.