Ring 2 Doorbell needs recharging every few weeks

I am having new frustrations with my Ring 2 Doorbell. I've had this doorbell for about 1.5 years. Recently my charge has been diminishing rapidly. I charged my battery for the first time to 100% and now, a few weeks later, the charge is down to 55%. I don't have any advanced motion sensing and have always kept my monitoring to a minimum. The trickle charge has always kept my battery operating at 99% or thereabouts. I don't know what other options there are for keeping my battery charged longer. After researching online to see how long a Ring battery lasts, I read 6-12 months. This has certainly not been the case for me. My wifi is working (otherwise the Ring wouldn't be operating). I have reset the wifi, and my router. What is happening? The customer service reps tell me exactly what I've already troubleshooted. And the weather has never affected my doorbell. I hope I don't need to purchase a new doorbell. Any suggestions? Thanks in advance!