I have one of these on the outside of my shed for several years. I added one inside last summer. The outside goes on/off anytime an animal runs by. Also I have noticed it start to cycle on/off repeatedly at night , especially on cloudy days. Might it be time to replace the rechargeable batteries?

Scarier...my kids notice the INSIDE light go on and off now and then, It supposed to be motion activated..and no one is in the shed. What could cause this? Batteries again?