Gen 1 Doorbell battery draining fast

I just charged my battery (which is hardwired as well) 2 weeks ago and the battery is already down to 35%. I charged it and installed it in July and it lasted on that charge until 2 weeks ago (December 29th)! How can it be draining so fast all of the sudden? At one point last month, I increased how much it was capturing, but then I changed it back to the original settings when I seen the battery draining. That is when I charged the battery. Right now, it only captures maybe 2-4 recordings a day, where I used to get probably 10 or more a day and the battery lasted 6 months doing that.